22 HELIX. 



erate ; whorls 7J, very slowly increasing, a little convex, the 

 last subcarinate above, not descending in front, base more con- 

 vex, smoothish ; aperture somewhat obliquely lunar, margins 



approaching. Diam. 8 mill. 



Hierro, Canary Is. 

 H. HERMANNI, Pfr. PI. 3, figs. 100, 1. 



Widely umbilicated, discoidal, closely costulate above, a little 

 shining, diaphanous, corneous; whorls 4^, a little convex, slowly 

 increasing, the last narrow, more slightly costulate on the base ; 

 umbilicus conical ; aperture subvertical, rounded-lunar, margins 

 approaching. Diam. 2 mill. 



Mirador, State of Vera Cruz, Mexico. 



H. AMANCAENSIS, Hidalgo. PL 3, figs. 2, 3. 



Widely, profoundly umbilicated, thin, very closely covered by 

 hair-like costulations, brownish corneous, spire subplanate, 

 suture profound ; whorls 5, slowly increasing, convex, narrow, 

 the last scarcely wider than the penultimate. Diam. 2'5 mill. 



Near Lima, Peru. 

 H. HUMILIS, Button. PL 3, figs. 4-6. 



Widely, profoundly umbilicated, striulate, diaphanous, a little 

 shining, brownish corneous ; whorls 5, rounded, periphery sub- 

 angulated. Diam. 3'3 mill. 



Landour, Eastern India. 

 H. COMA, Gray. 



Widely umbilicated, rather thin, obliquely costulate, ribs dis- 

 tant, straight, about nine in the tenth of an inch ; pale brown 

 with bands of reddish brown, periphery rounded. 



Diam. 5'5 mill. 



New Zealand. 



H. lau, Pfr., is a synonym. Unfigured : the H. coma, of Pfr., 

 being a different species, referred to H. lucetta. 



H. LUCETTA, Hutton. PL 3, figs. 7-9. 



Ribs rather distant, about fifteen in the tenth of an inch, 

 spire convex, more elevated than in the last species, periphery 

 obscurely angled ; pale brown obscurely spotted. Diam. 7 mill. 



New Zealand. 

 H. coma, of Pfr., not Gray. 



The animal is white, the peduncles purplish, and a band on 

 each side of the head slightly speckled with purple. 



