66 Gray on Helicina. 



Helicina fasciata. Lamarck Hist. vi. 103. 



West Indies, Porto Rico. Mauge. Mus. Nost. 



Shell depressed ovate, whitish, smooth, thin, pellucid ; above 

 convex, with a broad interrupted reddish line, beneath rather 

 convex, with a narrow red line near the upper part. Peristome 

 thickened, white, slightly reflected ; columella, base and inner 

 lip thickened, white ; inside whitish. Operculum thin, horny, 

 polished ; axis ^3_, diameter T 3 ^ of an inch. 



4. Helicina substriata. 



Testa depresso-ovata lutescente-albida, subcarinala, supra con- 

 vexa, distanter spiraliter substriata, subtus subconvexa, laevis; 

 Peristomate incrassato, reflexo (albido ?) columella labiisque in- 

 crassatis, callosis, (albidis ?) 



Cochlea n. 14. Brown Jam. t. 40, f . 4 ? West Indies. Mus. 

 Nost. 



Shell depressed ovate, yellowish with a white keel-like band 

 on the centre, above convex, with a few distant spiral striae, be- 

 neath rather convex, smooth ; the peristome thickened, reflected, 

 columella and inner lip callous (white ?) 



I have only one specimen of this shell, which is perfectly dis- 

 tinct from all the rest, it appears to be rather worn and bleached, 

 so that the peristome may be yellow, and the striae more distinct, 

 when perfect. 



5. Heiicina Bruziliensis. 



Testa depresso-ovata (albida ?) spiraliter striata, et minute con- 

 centrice catice'llata, supra et subtus convexa ; peristomate sub- 

 incrassato, labiis subincrassatis, columella basi excavate, carinata. 



Brazil. Mr. G. B. Sowei'by. 



Shell depressed ovate, (white ?) spirally stiiated, cancellated 

 with minute close concentric striae, spire convex, beneath rather 

 convex, peristome slightly thickened, reflected, inner lip slightly 

 thickened, the base of the columella with a triangular sharp-edged 

 excavation. 



Mr. G. B. Sowerby has shewn me many specimens of this shell, 

 and they all agree in the form of the base of the columella, or I 

 should have been inclined to consider them as the young of some 

 other species. 



