GASTROPODA— VOLUTIDJE— O LIVID 7E. 795 



604. A. mutabilis (Conrad). (Fig. 1165.) Miocenic. 

 Long and rather slender; last two or more whorls smooth, but 



with concave shoulder ; angle rounded ; aperture long ; canal some- 

 what curved ; plicae, two strong and a fainter one between. 

 Chesapeakean of Maryland, etc. 



605. A. typus (Conrad). (Fig. 1166.) Miocenic. 



Fig. 1 164. Caricella 



Fig. 1 165. Aurinia mu- 



Fig. 1166. Aurinia 



pyruloideSy X %• ( After 



tabilis ,X 2 A- (Md. Survey.) 



typus,X%- (Md. Sur- 



Conrad.) 





vey.) 



Shorter and more robust than preceding; aperture broadening 

 towards the front. Two columellar plications present. 

 Chesapeakean of Maryland, Virginia, etc. 



Family Olivid^e d'Orb. 



CLXXXVIII. Oliva Brug, 



Shell of subcylindrical outline, smooth and shining, with short 

 spire and long body whorl ; sutures sharply depressed ; aperture 

 narrow; columella with oblique folds. Cretacic-Recent. 

 606. 0. litterata Lamarck. (Fig. 1 167.) Miocenic-Recent. 



Slightly inflated above the middle ; suture canaliculate ; columella 

 plaited throughout. 



Miocenic of New Jersey, Maryland, North Carolina, west of 

 Florida to San Domingo, Jamaica; Pliocenic of the Carolinas and 



