214 CARINIFEX. 
Genus CARINIFEX, Binney. 
1. CARINIFEX NEWBERRYI, Lea. 
Plate 7, figs. 20—24. 
Shell light horn-color, turreted, very mi- 
nutely striated, above and below acutely cari- 
nated, broadly and deeply umbilicated, whorls 
five, flat above, sloping convex below; aper- 
ture large, subtriangular. 
California. 
This curious shell varies in appearance con- 
siderably. In old specimens the carination is 
sometimes nearly obsolete, as in our figure 24. 
The animal has not yet been described. 
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