Mr. Gray on some new Species of Quadrupeds and Shells. 29 



rally ridged and concentrically plaited; axis slightly perforated; 

 outer lip strongly thickened behind; canal short. Axis l'"8. 

 — Hab. ? My cabinet. 



Drillia bicolor, Gray. Shell blacky spirally striated, with a 

 subposterior series of angular tubercles crossed with a yellow 

 spiral band; inner lip thickened; mouth slate colour. Axis 4 ,// . 

 — Hab. ? My cabinet. 



Drillia suturalis, Gray. Shell yellowish white, closely spi- 

 rally striated; whorls with a posterior groove near the suture, 

 the upper whorls slightly nodulose; outer lip thickened be- 

 hind ; canal rather elongate, scarcely recurved. — Hab. ? 



My cabinet. 



Demoulia, Gray, n. g. (Buccinidce). Shell ovate, subglo- 

 bose, covered with a downy periostracum; spire short, conical; 

 apex papillary; whorls compressed; mouth ovate; inner lip 

 thickened, with a ridge behind, outer lip contracted, thicker ex- 

 ternally, not variced, strongly plaited internally ; canal short, 

 sharply recurved. — Intermediate between Nassa and Dolium, 

 but differs from both in being covered with a velvety peri- 

 ostracum, in having no distinct varices, in the large size of 

 the spire, and in the contraction of the mouth. 



Demoulia pulchra, Gray. Pale reddish, covered with a 

 brown periostracum, slightly spirally striated; outer lip white, 

 inner lip smooth; spire short; upper whorls rounded; suture 

 deep. Axis 10'". — Sierra Leone. My cabinet. 



Buccinum retusum, Lam. Encyc. Met. n. 24. t. 394. f. 3, and 

 perhaps the fossil Buccinum Pupa and B. glabratum, should 

 be referred to this genus ; the latter has the inner lip strongly 

 toothed or plaited, which unites it to Nassa. 



Pleurotoma tenuis, Gray. Shell fusiform, thin, pale, brown- 

 ish, pellucid; whorls with a broad smooth posterior sutural 

 concave band, convex in front, and marked with arched trans- 

 verse ridges ; canal tapering; mouth and canal nearly as long 

 as the spire; axis with a linear perforation in front. Axis 2". 

 — Sierra Leone. My cabinet. 



Mactra Sauliana*, Gray. Shell ovate-elongate, compressed, 



* I have named this species in honour of Miss Saul of Poplar, a most 

 industrious and liberal collector of shells, to whom I am indebted for this 

 species. 



