40 HELICID^. 



or globosely depressed ; whorls 4-1, the last anteriorly deflected, 

 somewhat angular usually, convex at base, compressed around 

 the umbilicus ; aperture elliptical-rounded ; peristome more or 

 less thickened, reflected, its extremities approaching. H. cica- 

 tricosa^ Miill. (xcvi, 95). 7 sp. China, Japan. 



ACUSTA, Albers, 1860. Shell umbilicate, thin, globose, closely 

 striated, shining; last whorl large, rounded; spire subconical, 

 aperture scarcely oblique. Innately rounded ; peristome simple, 

 acute; columellar margin dilated, reflected. 11 sp. China, 

 Japan. H. ravida^ Beason, 



SATSUMA, Adams, 1868. Shell globosely conoidal, perforate ; 

 lip reflected, the lower portion and base of shell plane. H. Lar- 

 gillierti, Phil. 6 sp. Japan. 



TRACHiA, Albers, 1860. Shell umbilicate, depressed, thin, 

 roughened by minute granules ; spire scarcely elevated ; whorls 

 four, somewhat flattened, the last deflected at the aperture and 

 constricted in front ; aperture obliquely subcircular ; peristome 

 thin, expanded, margins approximating, joined by a thin callus. 

 H. asperella, Pfr. 22 sp. India, East Indies. 



ANGASELLA, Adams, 1863. H. cyrtopleura^ Pfeiffer. 3 sp. 

 Australia. 



EURYSTOMA, Albers, 1850. Shell narrowly umbilicated, glo- 

 bosely depressed, calcareous ; whorls flve, the last convex at base, 

 deflected near the aperture ; aperture oval, contracted by the 

 last whorl ; peristome lipped, wide, its extremities approaching 

 and joined by a callus ; columellar lip straight within, dilated, 

 nearly touching the umbilicus. H. vittata^ Miill. (xcv, 58j». 

 Ceylon. 



PHASis, Albers, 1850. Shell umbilicated, thin, depressed, 

 convex at the base, spire a little elevated ; whorls four, rapidly 

 increasing ; aperture vertical, oval ; peristome simple, sharp ; 

 columellar lip dilated, reflected. H. llenkeana, Pfr. Cape 

 of GTood Hope. 



COCHLEA, H. and A. Adams, 1855. Shell more or less globular, 

 solid, colored; usually banded; peristome thicliened or reflected ; 

 aperture rarely dentate. H. aspersa^ Miill. 



Odontifra, Crosse and Fischer. Shell narrowly umbilicate, 

 depressed globular, granulate or haii'y ; peristome reflected. Jaw 

 with numerous longitudinal ribs and close transverse striae ; 

 hinder part of foot with a median serrated keel. H. Ghieshreghti^ 

 Nyst. (xcv, 52). Mexico. 



Lysinoe^ H. and A. Adams, 1855. (Aglaja, Albers, 1860.) Shell 

 umbilicate, orbicularly convex, banded ; whorls 4^-6, the last 

 deeply deflected in front ; aperture broad-lunate, oblique ; peris- 

 tome thickened, expansively reflected, white, the margins ap- 

 proaching ; that of the columella partially covering the umbilicus. 

 H. Jidelis, Gray (xcv, 53). 36 sp. Oregon to Peru. 



