68 Gray on Helkina. 



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

 small tubercle ; axis T 3 S , diameter -^ of an inch. 



9. Helkina rhodostoma. 



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

 morata, carina albida ; peristomate incrassato, reflexo, rufo-auran- 

 tiaco ; angulo columellari producto, spinoso ; columella callosa. 



Guadaloupe. Mus. J. Soizerby. 



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 reflected, simple, columella callous, aperture 

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

 lum horny with a process that Jits into the groove. 



10. Helkina major. 



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

 subtus convexiuscula pallida, peristomate incrassato, albo, reflexo ; 

 angulo columellari obtuse 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 angle, the inner lip thickened, convex, pale ; axis 

 \, diameter |. 



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

 the whorls rounder and smooth. 



11. Helkina submarginata. 



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

 centrice substriata, spira convexa, distanter spiraliter substriata ; 

 Mibtus convexiuscula laevigata, peristomate subincrassato parum 

 reflexo, labiis subincrassatis ; aperturae angulo columellari sub- 

 emarginato. 



Shell depressed ovate, very obscurely keeled, whitish brown, 

 rather darker above, concentrically striated, spire convex, very 



