230 MARINE SHELLS 



double series of prominent scales on the shoulder. 

 The bezoar, moreover, is described to be umbilica- 

 ted, a character which does not exist in our species. 



COLOMBELLA, Lam. 

 Species. 



C. *avara. Shell small, covered with a dirty - 

 brownish pigment, beneath which it is whitish reticu- 

 lated or maculated with rufous; spire elevated, acute ; 

 volutions eight, with spiral impressed lines, and 

 transverse elevated obtuse costa ; the costa upen the 

 body whirl are terminated at the middle, and are 

 about eleven in number ; labium with a distinct plate 

 crenated on the submargin; labvum denticulated 

 within, but not very perceptibly thickened on the in- 

 ner middle. 



Length less than half an inch. 



Inhabits the coast of the southern states. 



Cabinet of the Academy and Philadelphia Mu- 

 seum. 



Does not fully correspond with the characters of 

 this genus, as the labrum is not very distinctly dila- 

 ted on the inner middle, and the spire has the eleva- 

 tion of a Mitra. 



It is a common species, and occurs as far north as 

 the coast of Maryland. 



