Testa valvulis utrinque hiantibus. Cardo dente unico inflexo recurvo.
The _Mya lutraria_, _M. vulsella_, and _Pholas crispatus_ were
originally included in this genus.
S. VAGINA. _S._ linearis rectus, cardinibus unidentatis.
"Habitat in Indiæ littoribus arenosis: in mari Rubro (_Hasselquist_)"
was the recorded locality in the MS., where the European shell
delineated by Gualtieri was not then included: "Klein, 163. t. 11. f.
65" (a copy from the cited figure of Rumphius) was its substitute.
S. SILIQUA. _S._ linearis rectus, cardine altero bidentato.
The wretched drawings of Argenville were not quoted; but "Bonan. 2. f.
56" (error for 57), "Plane. t. 3. f. 6," and "List. Ang. 192. t. 5. f.
37," were cited instead.
S. ENSIS. _S._ linearis subarcuatus, cardine altero bidentato.
The final remark was not in the MS.
S. CULTELLUS. _S._ ovali-oblongus curvatus.
"Habitat in Amboinæ littoribus arenosis" is an addition of the MS. The
intended name (derived from Rumphius) was _cultriformis_.
S. RADIATUS. _S._ ovalis, cardinis costa tereti.
"Habitat in littoribus arenosis Xulii(?) Amboinæ" is an addition to
the published account. The intended specific name was _violaceus_, an
appellation bestowed upon it by Rumphius: "_solida_" was an emendation.
S. STRIGILATUS. _S._ ovalis, oblique striatus.
"Bonan. 2. f. 76" (error for 77) was an unpublished synonym.
S. ANATINUS. _S._ ovatus membranaceus, costa falcata.
_Rostrum anatis_ was the intended name.