GASTROPODA— CYPRJEIDJE—CASSIDIDJE. 759 



511. C. pinguis Conrad. (Fig. 1105.) Eocenic-Miocenic. 



Ventricose near the middle; outer lip strongly curved at the 

 spire; crenulation thick; basal callus rather marked. 



Fig. 1 105. Cypraa pinguis, profile and apertural views, X I -4- (After Dall. ) 



Eocenic of Louisiana, Oligocenic and Miocenic of Florida and 

 North Carolina. 



CXLIII. Erato Risso. 



Small shells with some of the characteristics of the young 

 Cyprcea; the spire only partly covered; columellar surface partly 

 denticulate; outer lip strongly so. Cretacic-Recent. 

 512. E. perexigua (Conrad). (Fig. noy,a.) Miocenic. 



Spire with a few smooth whorls embracing to above ambitus; 

 outer lip thick, with numerous strong denticulations ; those of 

 columella small, few and scattered. 



Chesapeakean of Maryland and Shiloh marls of New Jersey. 



Family Cassidim: Adams. 

 CXLIV. Cassidaria Lamarck. 

 Shells with short, conical or turbinate spires ; 

 large body whorl drawn out anteriorly into a 

 twisted canal which is bent sideways or back- 

 ward; expanded inner and reflected outer lip, 

 often crenulated, the columellar border plicate. 

 Cretacic-Recent. 

 513. C. brevidentata Aldrich. (Fig. 1106.) 



Eocenic. 

 Whorls embracing to just below the shoulder 



Fig. 1 106. Cassi- 

 daria brevidentata. 

 (After Harris.) 



