46 HELICID A. 
simple, the margins joined by a thin callus, the columellar mar- 
gin dilated, reflected. H. Fa alconari, Reeve. 5 sp. Australia, 
Madagascar, India, 
sTYLODONTA, Crist. et Jan., 1837. (Columplica, Mousson, 1844.) 
Shell imperforated, conoidal above, globose below ; whorls six or 
seven, the last ventricose ; aperture somewhat narrow, oblique; 
columella short, nearly direct, dentate and truncate ; peristome 
thin, reflected at the base, extremities united by a very thin 
parietal callus. H. cepoides, Lea (xevi, 83). 4sp. Seychelles 
and Philippines. 
EREPTA, Albers, 1850. Shell imperforate, rather depressed, 
solid, the last whorl subangulated; columella short, oblique, 
truneate, with astrong tooth; peristome simple, the basal margin 
somewhat thickened. HH. Stylodon, Pfr. (xev, 71). 138 sp. 
Mauritius. 
cocHLOsTYLUs, Fer., 1819. (Bulina, Lesson,1831. Helicostyla, 
Morch, 1865. Cochlostyla, Issel, 1874.) Shell not umbilicated, 
oval, conical, subbulimiform, ventricose ; apex somewhat obtuse: 
aperture large, ovate ; columella straight, sometimes slightly 
arcuated ; peristome wide, reflected. 214 sp. Philippines, ete. 
Axina, ’ Albers, 1850. Shell imperforated, usually covered by 
au transparent, caducous epidermis, depressed or subtrochiform ; 
whorls four or five, flattened, the last carinate on the periphery ; 
aperture securiform ; columella short, callous, oblique ; peristome 
labiate, reflected at the base. H. siquijorensis, Brod. (xevi, 97). 
10 sp. Philippines. 
Pfeifferia, Gray, 1853. (Named after Dr. Louis Pfeiffer, 
author of Monographia Heliceorum Viventium, etc.) Shell 
globular, imperforate, thin, fragile, white, pellucid ; spire not 
prominent, the last two whorls very large, forming nearly the entire 
shell; aperture rounded ; lip thin, sharp. Animal too large for 
complete retraction within the shell; mantle-margins reflected 
upon a part of the surface of the shell and forming a border on 
the peristome; foot moderate, depressed and attenuated poste- 
riorly, and without muciparous gland. H. micans (xcii, 15, 76) 
occurs on the leaves of bushes in the Island of Luzon. 2 sp. 
Philippines. 
Chlorea, Albers, 1850. (Thersites, Moérch, 1865.) Shell 
shining, imperforate, flattened, globosely depressed or lenticular ; 
whorls four or five, the last angular or carinated; aperture 
oblique, nearly horizontal, elliptical; peristome sharp, the 
extremities approaching, the basal lip widened, reflected. 4. 
fibula, Brod. 10 sp. Philippines. 
Corasia, Albers, 1850. Shell imperforate, depressed, rarely 
orbicularly conic, thin, diaphanous, flattened above, rounded 
below ; whorls 4-6, the last very often angulated or cari- 
nated ; aperture oblique, angular, large ; columella intrant, thin, 
