IlELICINA.— Plate VI. 



Species 48. (Fig. a, b, Mus. Brit.) 



HeliCINA e.KACUTA. Uel. testa stramined, laivi, Irochi- 

 forrni; spird subdepressd, acuminata ; ultimo 

 anfractu infrd, medium angidata, concinne cari- 

 natd; aperturd suhtrigond, lahio interno nibro, 

 columella obliqud, lahio externa infra medium 

 angulato. 



The sharpened Helicina. Shell straw-coloured, 

 smooth, trochiforni ; spire subdepressed, ac^i- 

 minated ; last whorl angular below the middle, 

 neatly keeled ; aperture subtrigonal, inner lip red, 

 columella oblique, outer lip angtilar below the 

 middle. 



Poey. Mem. II., p. 114. 



Helicina Straminea, Moricand. 



Hab. Cuba. 



Species 40. (Fig. a, b, Mus. Brit.) 



Helicina conoidea. Hel. testd parvd, albidd, de- 

 presso-trochiformi ; anfractibus planiusmlis, an- 

 gustis, ultimo anfractu subdepi-esso, infrd medium 

 acute angulato; aperturd pai-vd, labia externa 

 superne declivi, medio angulato, infrd subrotundd. 



The coNE-siiArED Helicina. Shell small, whitish, 

 depressed, trochiforni ; whorls rather flat, narrow, 

 last whorls depressed, sharply angular below the 

 middle ; aperture small, outer lip sloped above, 

 angular in the middle, a little rounded below. 



Pfeikfek. Proc. Zool. Soc. 1853. 



Hab. Barbadoes. 



Species 50. (Mus. Brit.) 



Helicina subtuiuuta. Ilel. testd 2>arrd, ttnui, viridi, 

 subtrochiformi ; spird acuminata, conicd, anfrac- 

 tibus supernii excavatis, medio angidatis, ultimo 

 anfractu infra convexo ; columelld rotunda, acn- 

 leatd. 



The subturreted Helicina. Shell small, thin, green, 

 subtrochiforni ; spire acuminated, conical, whorls 

 excavated above, angular in the middle, last whorl 

 convex ; columella rounded, needle-shaped. 



SowERBY. Thesaurus Conchyliorum, Part 25. Helicina, 

 sp. 103, PI. V. f. 185. 



Hab. ? 



A light, thin, horny species with the whorls curiously 

 hollowed above and angular in the centre. 



