228 MARINE SHELLS 



Length three-fifths of an inch. 



Inhabits the coast of the United States. 



Cabinet of the Academy and Philadelphia Mu- 

 seum. 



This species is not uncommon, particularly upon 

 our southern coast. The description is drawn from 

 what are termed dead shells, but I have one specimen 

 which is varied with rufous and whitish. 



OLIVA, Brug. 



Species. 



O. *mutica. Shell suboval, white, or yellowish- 

 white ; body whirl with about three revolving macu- 

 lated bands of pale rufous, of which the superior one 

 is continued upon the spire, the intermediate one is 

 dilated so as to be sometimes confluent with the in- 

 ferior one, which is narrowest ; spire short ; suture 

 very narrow ; columella destitute of striae. 



Length more than two-fifths of an inch. 



Inhabits the southern shores. 



Cabinet of the Academy and Philadelphia Mu- 

 seum. 



A common shell, varying somewhat in colour; the 

 bands are sometimes deep reddish-brown, sometimes 

 livid, rarely all united and offering only a white line 

 near the base. It seems allied to the 0. zonalis as 

 described by Lamarck^ but is a larger species. 



