_a._ The surrounding spongious zone,
_b._ The surface of the eye with lenses 60/1.
Spec. CG.
» 9. Horizontal section from the centrum of the eye 60/1. Spec. CF.
» 10. Horizontal section near the inferior margin,
_a_ the eye, _b_ marginal zone, _c_ a portion
of the cheek 60/1. Specim. CF.
» 11. Vertical section near the inferior margin 60/1,
same specimen as in fig. 10.
» 12. Eye fractured vertically showing regular prisms
in the eye (_a_) and irregular ones in the marginal
zone (_b_) 30/1.
» 13. Part of the hypostoma with the macula 12/1.
» 14. The right macula from the inside 12/1.
» 15. A vertical section across the hypostoma,
_aa_ the maculæ 8/1.
» 16. A similar one of the macula at left in the
preceding figure 60/1.
» 17. The right macula from the outside in transmitted
light 60/1. Sp. BQ.
=Asaphus fallax= DALM.? p. 41.
Fig. 18. Horizontal section of the eye 60/1. Spec. CD.
» 19. Vertical section of the same passing obliquely
through two rows of prisms 60/1.
» 20. Fragment of the same eye with entire prisms 30/1.
» 21. The hypostoma seen from the inside 3/1 from
Sandvik, Öland.
» 22. The left macula 12/1. Spec. BO. From Vestanå, Östergötland.
=Asaphus raniceps= DALM. p. 40.
Fig. 23. The left macula 12/1. Spec. BV.
» 24. Horizontal section of right macula 60/1. Spec. BY.
» 25. Vertical section of a macula 60/1.
» 26. A similar section of a macula (_a_) in the
longitudinal axis of the hypostoma 12/1.
Exterior surface at right.
All from Östergötland.
=Asaphus= sp. p. 41.
Fig. 27. A portion of the eye near the superior margin 30/1.
» 28. Horizontal section of the eye 60/1.
» 29. Horizontal section near the inferior margin 60/1.
» 30. Vertical section near the superior margin 60/1.
All figures from specimen CE. From Gotska Sandön.
K. Sv. Vet. Akad. Handl., Bd 34, No 8.
Lindström: Trilobites. Pl. I.
[Illustration]
G. Liljevall del.
Ljustryck af Chr. Westphal Stockholm.
Pl. II.
=Asaphus= (Isotelus) =gigas= J. HALL p. 42.
Fig. 1. The right macula surrounded by terrace lines 3/1.
» 2. Horizontal section of a macula with a part of the test 60/1.
» 3. Vertical section of the same, the surface of
the outside upwards 60/1. All specimens from
Cincinnati, Ohio, Hudson River group. Spec. BU.
=Bronteus irradians= LINDSTRÖM. p. 43.
Fig. 4. The hypostoma 4/1.
» 5. The left macula 12/1. Specimen from Gotland, Löjsta.
=Bronteus laticauda= ANG. p. 44.
Fig. 6. Horizontal section of the cephalic eye 20/1.
» 7. The same highly magnified 250/1.
» 8 & 9. Vertical sections of the cephalic eyes 20/1.
In fig. 8 with integument, in fig. 9 decorticated.
» 10. Hypostoma. Specim. N. 2/1.
» 11. The right macula, from the outside. Spec. O. 12/1.
» 12 & 13. Left maculæ, casts of the interior surface 12/1.
Specimens from Dalecarlia.
_Bronteus platyactin_ ANG. p. 43.
Fig. 14. Vertical section of cephalic eye, _a_ the eye.
_b_, cheek 20/1.
» 15. Hypostoma 2/1.
» 16. The same from the interior surface. Sockets
of the maculæ sunk in the shell 2/1.
» 17. The right macula 12/1.
» 18. Portion of the eye on the macula in transmitted light 20/1.
» 19. The same more magnified 60/1. Specimens
from the stratum _b_. Wisby, Norderstrand.
=Bronteus polyactin= ANG. p. 8.
Fig. 20. Horizontal section of cephalic eye 20/1.
» 21. Vertical section of the same 60/1.
» 22. Hypostoma 4/1.
» 23-25. Samples of right maculæ 20/1.
» 26. Horizontal section of macula, the portion
bearing the lenses 20/1.
» 27. Vertical section of the same 60/1, _a_ the
lenses. Specimen from Stora Carlsö.
» 28. Hypostoma 4/1.
» 29. The right macula 12/1.
» 30. A portion of the lenses on the macula in reflected
light 30/1. The lenses are only faintly convex and
encased in a white frame. The diameter of the largest
lenses 0,06 millim. Specimen from Lansa, Fårö.
=Bumastus barriensis= MURCH. p. 46.
Fig. 31. Hypostoma 4/1.
» 32. The right macula 12/1. Specim. CU from Wisby.
=Bumastus sulcatus= LINDST. p. 46.
Fig. 33. Horizontal Section of a cephalic eye 20/1.
» 34. The same magnified 60/1.
» 35. A similar, near the inferior margin and close
to the surface, _a_ the eye, _b_ cheek 60/1.
Compare fig. 38.
» 36. Vertical section of the cephalic eye near the
suture 20/1.
» 37. The same, more magnified 60/1.
» 38. A similar, near the inferior margin, _a_ eye,
_b_ cheek 60/1.
» 39. Cast of the interior surface of a hypostoma 2/1.
» 40. The same seen from the side.
Originals to figs. 33-38 from Samsugu,
Othem, Gotland, figs. 39 & 40 from Stora
Vede, Follingbo, Gotland.
=Bumastus= sp. p. 47.
Fig. 41. Horizontal section of cephalic eye, near the inferior margin,
_a_ eye, _b_ cheek, 60/1.
» 42. Vertical section of the same 60/1.
» 43. A similar near the inferior margin, _a_ eye,
_b_ cheek, 60/1.
» 44. Hypostoma 4/1.
» 45. Side view of the same.
» 46. The right macula 12/1. Specimens from Korpklint near Wisby.
=Bumastus= sp. p. 46.
Fig. 47. Hypostoma 4/1.
» 48. The right macula 12/1. Specimen from Klints, Othem, Gotland.
K. Sv. Vet. Akad. Handl., Bd 34, No 8.
Lindström: Trilobites. Pl. II.
[Illustration]
G. Liljevall del.
Ljustryck af Chr. Westphal Stockholm.
Pl. III.
=Bumastus= n. sp. p. 47.
Fig. 1. Hypostoma 4/1. Specimen AY. From Wisby, Norderstrand.
» 2. Its left macula 12/1.
=Bumastus= n. sp. (different from the preceding) p. 47.
Fig. 3. Hypostoma 4/1. Spec. AT from Wisby, Norderstrand.
» 4. Vertical section of the macula _a_ in its longest axis.
» 5. A portion of the cephalic eye, the facets very low.
=Calymmene intermedia= LINDSTR. p. 48.
Fig. 6. Hypostoma 4/1. Spec. BG from Gotland.
» 7. The left macula 12/1.
=Calymmene tuberculata= BRÜNNICH p. 48
Fig. 8. The inside of the hypostoma 3/1. Spec. BA from Gotland.
» 9. Horizontal section near the surface, seen from the
inside 20/1.
=Chasmops macroura= (?) p. 49.
Fig. 10. The left macula, cast of the inside 12/1. Rostock.
=Chirurus glaber= ANG. p. 50.
Fig. 11. A portion of the surface of the cephalic eye 12/1.
From Dalecarlia.
=Chirurus ornatus= DALM. p. 50.
Fig. 12. Horizontal section of a Cephalic eye near the surface 60/1.
» 13. Vertical section of the same, 20/1, at the inferior
margin. A line added to show the supposed size of the
fragmentary lenses.
» 14. The left macula of the hypostoma 12/1.
From Östergötland, Westanå.
=Chirurus spinulosus= NIECZKOWSKI p. 51.
Fig. 15. The right macula of the hypostoma from the
inside 12/1. Belongs to Dr. G. HOLM, from
Esthonia, Kuckers C^2.
=Chirurus= sp. p. 51.
Fig. 16. The left hypostomic macula 12/1. Öland, Brunsby kanal.
=Cyrtometopus clavifrons= DALM. p. 49.
Fig. 17 & 18. Horizontal sections of cephalic eyes 60/1.
» 19. Vertical sections of cephalic eyes and a part
of the cheek 20/1.
» 20. A highly magnified portion of the eye in vertical section
60/1.
» 21. Hypostoma, 3/1 the anterior wings completed after another
specimen. From Östergötland.
=Cyphaspis elegantula= ANGELIN p. 52.
Fig. 22 & 23. Horizontal and Vertical sections of cephalic eyes 60/1.
Diameter of facets 0,03 mm.
» 24 & 25. Hypostomas from the front side and
in side view 8/1. Upper Silurian, Gotland.
=Ctenopyge pecten= SALTER p. 29.
Fig. 26. The head shield, the free cheeks added from other
specimens 4/1.
» 27. A free cheek, viewed without foreshortening, as in its
natural position 4/1. Alumschists of Andrarum, Scania
=Ctenopyge= n. sp. (LINNARSSON, Geol. För. Förhandl. 1880, pl. VI,
figs. 14, 15) p. 29.
Fig. 28. A free cheek 6/1.
» 29. Surface of the eyes, near the suture 30/1.
» 30. The same next the free cheek 30/1. Andrarum.
=Sphærophthalmus alatus= ANG. p. 29.
Fig. 31. The head shield; the free cheeks have been added 8/1.
» 32. A free cheek without foreshortening 8/1.
» 33 & 34. Horizontal and Vertical sections of cephalic eyes
100/1. The cornea nearly 0,01 mm. in thickness. Andrarum.
=Peltura scarabæoides= WAHLENB. p. 29.
Fig. 35. The head shield; the free cheeks added 2/1.
» 36. A free cheek, not foreshortened 4/1.
» 37. A cast of the inside of the cephalic eye 20/1.
» 38. A portion of the cephalic eye from the inside 60/1.
» 39. A portion of the same in transmitted light 100/1.
» 40. Vertical section of an eye 100/1. The rock on the inside.
» 41. A similar one passing through two rows of lenses, the one
behind the other. The rock on the outside 100/1.
» 42. A hypostoma 8/1. Andrarum.
=Dalmanites imbricatulus= ANGELIN p. 53.
Fig. 43. The cephalic eye near the inferior margin 20/1.
» 44. Vertical section of the same and a portion of the free
cheek 60/1. The lenses are almost contiguous and the
interspace between them is formed by the common test of
the body, which is perforated by longitudinal tubes.
=Dalmanites obtusus= LINDSTR. p. 53.
Fig. 45. Horizontal section of cephalic eye near the inferior
margin 30/1.
» 46. Vertical section, the interspaces being in this wider than
in the preceding 60/1. From Gotland.
=Dalmanites vulgaris= SALTER P. 54.
Fig. 47. Part of the cephalic eye near the inferior margin 20/1.
» 48. Horizontal section near the surface at the inferior
margin 30/1.
» 49. A tangential section, so that the inferior part is below
the lenses where the peculiar radiating structure is seen
in horizontal section 30/1.
» 50. Vertical section of a small Specimen, fibrous appendices
below the lenses 30/1.
» 51. Hypostoma 2/1.
» 52. The right macula 12/1. English specimens from Dudley,
Shropshire.
=Dysplanus centrotus= DALMAN p. 55.
Fig. 53 & 54. Horizontal and vertical sections of an eye 60/1.
» 55. Hypostoma 3/1.
» 56. The anterior wing of the hypostoma seen in foreshortening
6/1. Specimen AX from Westanå, Östergötland.
=Dysplanus ladogensis= HOLM p. 55.
Fig. 57. Hypostoma 3/1.
» 58. The same, seen from the side 3/1. Specimen AI from
Östergötland.
K. Sv. Vet. Akad. Handl., Bd 34, No 8.
Lindström: Trilobites. Pl. III.
[Illustration]
G. Liljevall del.
Ljustryck af Chr. Westphal Stockholm.
Pl. IV.
=Chirurus speciosus= HIS.
Fig. 1. The right macula, cast of the interior side 12/1.
Specimen from Grumpevik, Vamlingbo, Gotland.
=Cybele bellatula= DALM. p. 52.
Fig. 2. The hypostoma 3/1. Vestanå, Östergötland.
=Dalmanites sclerops= DALMAN p. 54.
Fig. 3. The hypostoma 2/1.
=Encrinurus punctatus= WAHLENB. p. 56.
Fig. 4. Horizontal Section of an eye 69/1. Diameter
of the prisms 0,04 mill., their length 0,07 millim.
» 5. The hypostoma 3/1.
» 6. The left macula. Reflected light 12/1.
» 7. Part of the left macula in transmitted light 20/1.
The black streaks are sectioned pores. Spec. BH.
» 8. Vertical section of the right macula, a sagittal
section 20/1. BH.
» 9. A similar one _a_ along the shorter diameter 20/1.
Specimens 5, 6 from Vikers Boge, 4, 9 Medebys, Hall,
7, 8 Svarfvarehuk. All from Gotland.
=Encrinurus lævis= ANG. p. 56.
Fig. 10. Horizontal section of the cephalic eye.
» 11. Vertical section of the same. Both 60/1.
Prisms 0,05 in breadth, 0,06 in length. Specimen
from Wisby.
» 12-17. Longitudinal profiles and anterior margins of the
hypostomas of Encr. punctatus (figs. 12, 13),
E. obtusus (figs. 14, 15) and E. lævis (figs. 16, 17).
=Harpes vittatus= BARR. p. 31.
Fig. 18. The two ocelli at right 8/1.
» 19. Sagittal Section of two ocelli 60/1. Specimen from Lochkow
E, e^2, Bohemia.
=Homalonotus Knighti= KÖNIG p. 57.
Fig. 20. The hypostoma 3/2.
» 21. The right macula, from the interior side in transmitted
light 20/1. From Scania.
=Illænus chiron= HOLM p. 58.
Fig. 22. Horizontal Section of an eye.
» 23. Vertical section of the same, both 60/1. Spec. AG.
» 24. Hypostoma 2/1. Spec. AF.
» 25. The right macula seen in reflected light. The lenses
translucent 12/1. Ex. AA. All from Persnäs, Öland.
=Illænus Esmarki= SCHLOTH. p. 511.
Fig. 26 & 27. Horizontal sections of the eyes in two different
specimens 60/1.
» 28. Vertical section of an eye 60/1.
» 29. Likewise, _a_ the eye, _b_ a portion of the
cheek 12/1.
» 30. Hypostoma 2/1.
» 31. The inside of the right macula 12/1. Spec. AR.
» 32. The outside of the left macula in transmitted light 60/1.
» 33. Sagittal section of the macula (_a_) 60/1.
All specimens from Vestanå, Östergötland, excepting
fig. 30 belonging to Dr. HOLM, from
Norway, Bjerkaas.
=Illænus gigas= HOLM P. 59.
Fig. 34 & 35. Surface views of the prisms of the eyes, fig. 34 at
the superior margin and 35 at the inferior one 12/1.
» 36. Cast of the inside of a hypostoma 1/1. Same original as
HOLM'S fig. 6 Tafl. I, Illænider.
» 37. Cast of the inside of the left macula. Same specimen 12/1.
=Illænus Roemeri= VOLLBORTH (Ill. vivax HOLM) p. 59.
Fig. 38. Hypostoma 1/1. Spec. AO.
» 39. The right macula; the lenses translucent in reflected light
12/1. Spec. AO.
» 40, 41. Both maculæ of another, larger specimen 12/1. Sp. AP.
From the Leptæna limestone of Dalecarlia.
=Illænus sphæricus= HOLM p. 59.
Fig. 42. The prisms of cephalic eye 12/1. }
» 43. The right maculæ, transparent in }
transmitted light 12/1. Sollerön, } Spec. AH.
Dalecarlia. }
=Lichas= sp. p. 60.
Fig. 44. The hypostoma 1/1.
» 45. Cast of the inside of the right macula 12/1. Spec. T.
» 46. Cast in wax of the preceding 12/1.
» 47. Cast of the inside of the hypostoma. The central portion
with the maculæ 3/1. Spec. V.
» 48. Inside of the right macula 12/1. Spec. Y.
From a quarry north of the gallows near Wisby.
=Lichas latifrons= ANG. p. 60.
Fig. 49. The right macula, transmitted light, seen from the inside
60/1. From Kyrkberget, Wisby.
=Platymetopus planifrons= ANG. p. 67.
Fig. 50. The hypostoma 1/1.
» 51. The left macula. Transparent lenses? 12/1.
From the Leptæna limestone of Dalecarlia.
=Trochurus pusillus= ANG. p. 70.
Fig. 52. The hypostoma 5/1.
» 53. The right macula in transmitted light. Seen from the inside
60/1. From Fröjel.
=Trochurus?= p. 70.
Fig. 54. The hypostoma 3/1.
» 55. The right macula from the inside 12/1. From När Gotland.
K. Sv. Vet. Akad. Handl., Bd 34, No 8.
Lindström: Trilobites. IV.
[Illustration]
G. Liljevall del.
Ljustryck af Chr. Westphal Stockholm.
Pl. V.
=Megalaspis attenuata= WAHLENB.
Fig. 1. Horizontal section of cephalic eye near the inferior margin
60/1. _a_ surface of the eye, _b_ frame with irregular or
reserve prisms, _c_ part of the cheek with normal
structure. Spec. DP.
» 2. Hypostoma 2/1. Spec. BM.
» 3. The right macula 12/1.
» 4. Part of the same in transmitted light 60/1. Spec. DR.
» 5. Vertical (sagittal) section of the inferior part of the
hypostoma, crossing the macula _a_ 12/1.
» 6. Vertical section of the same macula 60/1. All spec. from
Westanå, Östergötland.
=Megalaspis limbata= BOECK p. 61.
Fig. 7. Hypostoma, mostly decorticated 2/1. Specimen from Fogelsång,
Scania, the same as BRÖGGER'S original to his
fig. 23.
=Megalaspis planilimbata= ANGEL. p. 61.
Fig. 8. Hypostoma, Öland, Äleklinta 2/1.
=Megalaspis= sp.
Fig. 9. Vertical section of macula (_a_) 12/1. Öland, Lower
grey Orthoc. limestone.
=Nileus armadillo= DALM. p. 62.
Fig. 10. Horizontal section of cephalic eye 60/1.
» 11. Vertical section of the same 60/1.
» 12. A similar section 60/1. _a_ the prisms of clear
calcareous spar, _b_ the surface of the eye and
the free cheek of yellow spar.
» 13. The hypostoma 2/1.
» 14. The right macula 12/1.
» 15. Vertical section of macula (_a_) 12/1. All specimens
from Persnäs, Öland, excepting fig. 13 from Westanå,
Östergötland.
=Symphysurus palpebrosus= DALMAN p. 62.
Fig. 16. Horizontal section of cephalic eye 60/1.
» 17. Vertical section of the same 60/1.
» 18. Hypostoma 2/1. From Westanå, Östergötland.
=Niobe frontalis= ANG. p. 63.
Fig. 19. The hypostoma 2/1.
» 20. The right macula 10/1.
» 21. Part of the same in transmitted light 60/1.
Specimen from Kungs Norrby, Östergötland.
=Niobe læviceps= ANG. p. 63.
Fig. 22. Horizontal section of cephalic eye near the inferior margin,
_a_ cheek 60/1.
» 23. Hypostoma 2/1.
» 24. The right macula 10/1.
» 23. Part of the same in transmitted light 60/1.
» 26. Vertical section of macula _a_ 12/1.
=Ogygia dilatata= var. =Sarsi= ANGEL. p. 63.
Fig. 27. Hypostoma 2/1.
» 28. The right macula 10/1. From Christiania, Haakavik, Collection
of Dr. G. HOLM.
=Olenus= sp. p. 33.
Fig. 29. A part of the free cheek with the scallop 6/1.
» 30. Profile of the scallop. Andrarum, Scania.
=Parabolina spinulosa= WAHLENB. p. 33.
Fig. 31. The free cheek with the scallop 3/1.
» 32. Profile of the scallop. From Jemtland.
=Paradoxides oelandicus= ANGEL. p. 64.
Fig. 33. Hypostoma 2/1.
» 34. The left macula 12/1. Öland, Torp.
=Phacops cephalotes= BARR. p. 65.
Fig. 35. The hypostoma; the shell mostly decorticated and the
maculæ visible as casts on the inside.
» 36. Cast of the inside of the right macula 12/1. Spec. from
Lochkow, Bohemia.
=Phacops quadrilineata= ANGEL. p. 66.
Fig. 37. Horizontal section of cephalic eye near the inferior margin
30/1. The dark points lie in the outermost stratum of the
cheek.
» 38. Vertical section of cephalic eye 20/1. An irregularly
hexaedral crystal below each lens. Specimen from Wisby _a_.
K. Sv. Vet. Akad. Handl., Bd 34, No 8.
Lindström: Trilobites. Pl. V.
[Illustration]
G. Liljevall del.
Ljustryck af Chr. Westphal Stockholm.
Pl. VI.
=Phacops macrophthalmus= BURM. p. 65
Fig. 1. Horizontal section of the cephalic eye 30/1.
» 2. A similar one near the inferior margin, _a_ cheek 30/1.
» 3. Vertical section of a cephalic eye 30/1.
» 4. A similar, twice as much enlarged 60/1.
» 5. Also a similar, _a_ cheek 30/1.
» 6. Hypostoma 2/1. Spec. EA.
» 7. The wings of the hypostoma, seen without foreshortening
4/1. EA.
» 8. The diminutive right macula 12/1, surrounded by incoherent
terrace lines.
» 9. The left macula 12/1. Specimens from Gerolstein Eifel, Devon.
=Acaste= sp.? p. 51.
Fig. 10. The hypostoma 8/1. From Mulde, Fröjel, Gotland.
=Phaëtonides Stokesi= MURCH. p. 66.
Fig. 11. Hypostoma 4/1. Gotland, Eksta, Djupvik.
=Phillipsia= sp. p. 66.
Fig. 12. A portion of the cephalic eye 20/1.
» 13. The hypostoma 4/1.
» 14. The right macula 12/1. Specimen from Beeren Eiland, Oswalds
förberg, communicated by Hr. J. G. ANDERSSON.
=Phillipsia= sp.? p. 66.
Fig. 16. The hypostoma 3/1.
» 16. The right macula 12/1.
» 17. Horizontal section of the cephalic eye 60/1.
» 18. Vertical section of the cephalic eye, _a_ cheek 60/1.
Probably from the Carbon of Belgium.
=Proetus concinnus= DALM. p. 67.
Fig. 19. Horizontal section of the cephalic eye, a little oblique, at
right the innermost stratum with the rock 60/1.
» 20. Vertical section of the cephalic eye. The diameter of the
prisms 0,03 millim.
» 21. Hypostoma 4/1.
» 22. The right macula 12/1.
» 23. The same with a light, transparent spot 12/1. Specimen
from Djupvik, Eksta.
=Proetus conspersus= ANG. p. 68.
Fig. 24. A portion of the cephalic eye 20/1.
» 25. The hypostoma. Cast of the interior side 4/1.
» 26. Cast of the interior side of the left macula 12/1.
Fig. 24 from Öja, Gotland, the others from Kräklingbo.
=Proetus signatus= LDM. p. 68.
Fig. 27. Hypostoma 4/1.
» 28-30. Three pair of maculæ with dark ocelli in a white spot.
=Ptychopyge angustifrons= DALM. p. 69.
Fig. 31. Horizontal section of the cephalic eye 250/1.
» 32. Hypostoma, a broad variety 1/1.
» 33. Another, a narrow variety 1/1.
» 34. The left macula of the hypostoma fig. 32 4/1.
» 35. A similar of the narrow variety 4/1.
» 36. Vertical section of a macula. _a_ the macula 20/1.
Specimens from Vestanå and Kungs Norrby, Östergötland.
=Ptychopyge cincta= BRÖGGER p. 69
(according to FR. SCHMIDT. The figure 12 _a_ of BRÖGGER resembles,
however, the hypostoma of Pt. angustifrons, but not the hypostomata
which have been prepared from the Ptych. cincta).
Fig. 37. A hypostoma; the maculæ are directed obliquely 2/1.
» 38. The right macula of another specimen 4/1.
» 39. Vertical section of a macula 60/1. Specimens from Kungs
Norrby, Östergötland.
=Ptychopyge aciculata= ANG. p. 68.
(Compare BRÖGGER II Taf. I, fig. 13.)
Fig. 40. The hypostoma, cast of the interior surface 1/1.
» 41. Cast of the right macula 4/1. Specimen from Öland, Brunsby.
=Ptychopyge glabrata= ANG. p. 69.
Fig. 42. Original of BRÖGGER'S fig. 14. Cast of the inside of
the right macula 4/1. Ǎlleberg.
=Elyx laticeps= ANG. p. 19.
Fig. 43. The interior surface of the right fixed cheek and the
glabella. Magnified. Specimen from Andrarum. 4/1.
=Conocoryphe= p. 19.
Fig. 44. Cast of the interior surface of the left cheek. Magnified.
From Andrarum. 4/1.
=Solenopleura brachymetopa= ANGEL. p. 19.
Fig. 45. The head shield, cast of the interior surface. Magnified.
Specimen from Andrarum, Scania. 4/1.
=Apus cancriformis= SCHÄFFER p. 73.
Fig. 46. The hypostoma from the outside 8/1.
» 47. The same from the inside 8/1.
» 48. A side view of the same, 8/1. _a_ the duplicature of the
head shield, _b_ posterior integument of the hypostoma,
_c_ the ventricle, _d_ the mouth.
» 49. The right white spot at the posterior margin of the hypostoma,
seen from the outside in transmitted light 150/1.
K. Sv. Vet. Akad. Handl., Bd 34, No 8.
Lindström: Trilobites. Pl. VI.
[Illustration]
G. Liljevall del.
Ljustryck af Chr. Westphal Stockholm.
* * * * *
Transcriber Note
Minor Typos were corrected. Inconsistencies in capitalization and
abbreviations were left as printed.