156 Mr. G. B. Sowerby on the 



to crimson, with a whitish transverse band ; edge of the outer lip flatten- 

 ed, inner edge denticulated : columellar lip with an oblique callosity at 

 the upper end, depressed at the lower part ; extremities rather acumi- 

 nated and obtuse. 



One of the smallest species I know ; I have only seen two or three 

 specimens, and am unacquainted with its locality. 



OVULUM GIBBOSUM, 



Lam., Anim. sans vert. VII. 369. 

 O. testa oblongd, utrinque obtusd, albidd seu aurantiaco-fulvd; angulo 

 elevato obtuso supra medium cingulato; long \^o, lat. \-^, poll. 

 Bulla gibbosa, nonnulL 

 Ultimus, Montf. 



Testa junior labii externi margine acuto, dorso obsolete angulato. 

 Var. 1*. canali superiore angustiore ; long, l-^^, lat. -j^, poll. 

 Var. 2*. testa breviore, latiore; long, l^'o* ^at. J-^, poll. 

 Hob. ad littora Brasihae insularumque Indiae Occidentalis. 



Desc. Shell of an oblong form, obtuse at both extremities, upper 

 extremity of the aperture rather narrower than the lower ; canal at both 

 ends nearly straight; lips a good deal thickened, inner edge of the 

 outer lip a little irregular, not toothed : the glaze deposited by the two 

 coats of the mantle not meeting in the centre of the back, the interme- 

 diate space longitudinally striated, generally of a lighter colour than the 

 edges, which are mostly of a dull orange yellow, darker on the dorsal 

 than on the ventral side. In its young state this species scarcely shows 

 any of the angulai* dorsal gibbosity which so eminently characterizes it 

 when full grov^m. There are two varieties, one of which is shorter and 

 broader, the other narrower at the upper extremity, and rather paler in 

 colour and slenderer in form than the principal variety. 



A common species from the coast of Brazil and the West India Islands. 



OvULUM OBTUSUM. 



O. testa ovatd, utrinque subacuminatd, obtusd, Icevi, albicantc; aperturd 

 prope basin subeffusd ; labiorum marginibus Icevibus ; long. -^^ 

 lot. ^%, poll. 



