174 POMPHOLYX. 
' Genus POMPHOLY X, Lea. 
Shell dextral, depressed-globose, translu- 
cent, horn-colored; spire short, obtuse, last 
whorl very wide, ventricose; aperture very 
large, wide, subcircular, expanded ; inner lip 
thickened, outer lip acute. 
1. POMPHOLYX EFFUSA, Lea. 
Plate 18, figs. 12, 13, 14. 
Shell small, roundly gibbous, rather thin, 
effuse, reddish horn-colored or greenish, 
whorls five, flattened above, convex below ; 
aperture sub-rotund, dilated, within white. 
Length 6, diam. 8 mill. 
California. 
(90) 
