Gray on Helicina. 65 



albida bifasciata, peristomate tenui, reflexo, albo, rufo trimaculato, 

 labio subincrassato, operculo testaceo. 



West Indies, Mrs. Gray. Mus. Brit. Sowerbg, Nost. 



Shell yellowish, with three interrupted and sometimes obscure 

 reddish bands ; above conical, with white rugose spiral lines, 

 whorls rather convex ; beneath convex, spirally striated, with 

 two interrupted white bands. Peristome thin, reflected, white, 

 the outer lip much extended, with three reddish spots where the 

 bands end, the under lip slightly thickened ; operculum very thin, 

 shelly, polished ; axis T ^, diameter ^ of an inch. 



2. Helicina neritella. 



Testalaevis (depresso-ovata) albida, fusco-bifasciata, supra conica, 

 purpureo-fasciata vel marmorata, subtus convexa ; peristomate in- 

 crassato, reflexo, luteo, columella labiisque callosis, luteis ; oper- 

 culum corneum. 



Helicina neritella. Lamarck Hist. vi. 103. 



Lister Conch, t. 61, f. 59. t. 74, f. 73, junior, peristomate 

 tenui, columella lutea, foveolata. West Indies, Barbados. Lister. 



Shell depressed ovate, smooth, whitish (or lilac) with two nar- 

 row brown bands ; above conical, variegated or banded with purple : 

 whorls, scarcely convex ; beneath rather convex, peristome 

 thickened, reflected, yellow, columella and inner lip thickened, 

 yellow, inside white with purplish bands, operculum horny, 

 brown with a white shelly edge on the inner side; axis ^, 

 diameter -^ of an inch. 



When young it is entirely purplish, with a few obsxure darker 

 bands, the lips are thin, and the columella is callous, yellow, with 

 a small pit ; when bleached the shell is white with two dark 

 bands. 



This appears, from its yellow columella, to be the species de- 

 scribed by Lamarck, but his character is very obscure ; like most 

 of the genus, it varies greatly in size. 



3. Helicina fasciata. 



Testa depresso-ovata, albida, laevis, tenuis, pellucida ; supra con- 

 vexa, interrupt^ rufo-fasciata ; subtus sub-convexa, rufo lineata, 

 peristomate incrassato, reflexo, albo, columella labiisque callosis, 

 albis; operculo cornea. 



Vol. I. e 



