68 Gray on Helicina. 



angle of the aperture next the columella callous, produced into a 

 small tubercle ; axis ^3_, diameter J'^ of an inch. 



9. Helicina rhodostoma. 



Testa subdepresso-carinata, punctulata, albida, rufescente mar- 

 morata, carina albida ; peristomate inCrassato, retlexo, rufo-auran- 

 tiaco ; angulo columellari producto, spinoso ; columella callosa. 



Guadaloupe. Mus, J. Sozcerbi/. 



Shell rather depressed, conical, keeled, minutely punctulated 

 and scratched, whitish, marbled with brownish, the keel white, 

 sharp, peristome thickened, especially in the hinder part, much 

 extended and reflected, of a fine reddish orange, slightly pro- 

 duced in the front part close to the columellar angle into a sharp 

 recurved spine, the columella is callous and of the same colour as 

 the lips ; axis |, diameter \ an inch. 



*** Peristome rejlected, simple^ columella cqllous, aperture 

 with a groove and notch or slit at the columellar angle. Opercu- 

 lum horny with a process that Jits into the groove. 



10. Helicina major. 



Testa depresso-ovata subglobosa, fuscesens, lasvis, spira convexa ; 

 subtus convexiuscula pallida, peristomate incrassato, albo, reflexo; 

 angulo columellari obtqse emarginato ; labiis incrassatis pallidis. 



Mus. Sowerby. 



Shell depressed ovate, nearly globular, brownish, smooth, spire 

 convex, upper part purplish, front rather convex, pale, the peris- 

 tome thickened, white, reflected, with a slight blunt notch near 

 the columellar augle, the inner lip thickened, convex, pale j axis 

 •|, diameter |. 



Diflfers from the following by the lip being more reflected, and 

 the whorls rounder and smooth. 



11. Helicina suhmarginata. 



Testa depresso-ovata obscurissime carinata, albido-fusca, con- 

 oentrice substriata, spira convexa, distanter spiraliter substriata; 

 r.ubtus convexiuscula laevigata, peristomate subincrassato parum 

 reflexo, labiis subincrassatis ; aperturae angulo columellari sub- 

 emarginato. 



Shell depressed ovate, \ery obscurely keeled, whitish brown, 

 rather darker above, concentrically striated, spire convex, very 



