174 POMPHOLTX. 



Genus P M P H L Y 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) 



