270 



AMPHIPERASID/E. 



large, broad, ovate, with numerous long, linear, equal, 

 curved digitations on the upper edge. 



Mantle-lobes expanded, covering the sides of the shell, 

 bearded externally. 



Operculum none. 



Shell pointed at each end, smooth, polished, the extre- 

 mities more or less produced ; inner lip without teeth ; 

 margin of outer lip inflexed. 



Genus AMPHTPERAS, Gronovius. 



Mantle-margin simple ; foot large, thin, expanded. 



Shell ovate, ventricose; aperture narrow, extremities not 

 prolonged into canals; outer lip inflexed and transversely 

 wrinkled ; inner lip smooth, simple. 



Syn. Conchylium, Tournef. Licium, Humph. Serai- 

 porcellana, Da Costa. Birostris, Fahr. Ovulus, Montf. 

 Ovula, Brug. Ovulum, Sow. 



E,v. A. ovum, Linncpus, pi. 28, fig. 6. Shell, A. ovum, 

 fig. 6, a. 



The shells of this genus are never ornamented with rich 

 or varied colours, like those of the Cowry tribe, but are 

 usually white, pink, pale violet, or yellow, without exhi- 

 biting any particular markings or pattern. 



Species of Amj)hiperas. 



Adriatica, Sow. 

 angulosa, Lam. 

 brevis, Sow. 

 bulla, Sow. 

 builulata, Soiv. 

 caruea, Poiret. 



concinna, Sow. 

 dentata, Sow. 

 dorsuosa, Hinds. 

 formosa, Soio. 

 liordacea, Lam. 

 lactea, Lam. 



