_Glycera exigua_ sp. nov.
A small species easily recognizable among the known forms of the
California coast by the character of the parapodia. Each of these
present three lips, two anterior and one posterior; all three lobes
triangular, pointed distad, with the posterior one fully equalling the
other two in length. The neurocirrus is also triangular in outline.
The natocirrus is reduced to a small rounded or nodular form slightly
above base of parapodium. Branchiæ simple cylindrical filaments, each
attached toward distal end of parapodium above as in _G. alba_ and _G.
longipinnis_; the first occurring on or near somite XXX, short, in
actual length not greater than parapodium exclusive of terminal lips
and falling much short of reaching ends of setae; absent from last
twelve segments or so and those just in front of this caudal region
much reduced. Prostomium of usual general form; consisting of fourteen
or fifteen rings. Proboscis long; weakly longitudinally ridged and
densely finely papillose. Body strongly narrowed from the anterior
region caudad, the caudal end slenderly pointed. Segments biannulate.
Number of segments in the type near one hundred and thirty.
Length, 26 mm.; width, 1.5 mm.
Type--M. C. Z. 2, 158.
Balboa, December 26, 1917.
_Glycera basibranchia_ sp. nov.
Resembles _exigua_ in having the branchiæ in the form of a series of
single, simple filaments but readily distinguished in having each
branchia attached at base of parapodium on the dorsocaudal surface
just ectad of the notocirrus instead of at the distal end above. The
branchiæ begin on the twenty-ninth setigerous somite and continue to
about the one hundred and twenty-ninth, decreasing in size at the two
ends of the series. In the middle region they are cylindrical, distally
rounded, and transparent, and at most do not surpass the distal end of
the parapodium, most of these being obviously shorter than this in the
preserved specimen. Also decidedly different from _exigua_ in having
four lobes at the distal end of each parapodium, two postsetal and two
presetal. These are narrowly triangular, distally pointed, with the
presetal lobes thicker and more conical and decidedly longer than the
postsetal. The short, distally rounded notocirri are attached at the
base of the parapodia above in the angle between the latter and the
body wall. Neurocirri distally subcylindric, resembling the distal
parapodial lobes. The prostomium distinctly ringed to near middle,
the basal half showing five rings while the distal half in the type
is only vaguely annulate, though with indications of apparently seven
nearly fused rings, making the total number twelve. Proboscis long,
densely papillose. Type incomplete caudally; one hundred and forty-five
segments retained.
Length (not quite complete), 36 mm.; greatest width, 1.3 mm.
Type--M. C. Z. 2, 159.
A note gives the color in life as light, the red blood showing through
as usual in the family.
_Glycera verdescens_ sp. nov.
A very small form differing from the two preceding in wholly lacking
branchiæ. The parapodia are strikingly different in that the postsetal
lobe is either wholly absent, as in anterior region, or is represented
by a single, small, pointed process, while there are two presetal
lobes which are long and subcylindrical or finger-like and of which
the ventral one is ordinarily the larger. The notocirrus is small and
occupies the usual place in the angle between the dorsal surface of the
parapodium and the body-wall. Neurocirrus slenderly conical, darkened
distad as are also the presetal lobes. The slenderly conical prostomium
showing twelve annuli. Type at present showing a distinctly greenish
tinge. Type incomplete caudally, sixty-nine segments retained, the
length being 13 mm., width, 1.1 mm.
Type--M. C. Z. 2, 160.