GASTEROPODA : VOLUTID^. 



481 



VOLUTIONS, OR VOLUTE FAMILY. This Family con- 

 tains gasteropods which have the shell turreted or convo- 



Fig. 395- 



Fig. 396. 



Mitra episcopalis, D'Arg. One half. Ceylon. 

 Fig. 397- 



Valuta mustca, Linn. One half. 

 West Indies. 



Marginella nubeculata, Lam. 

 Two thirds. W. Africa. 



lute, and the aperture notched in front. There are seven 

 hundred living, and two hundred fossil species. Marine. 

 CYPR^EID^:, OR COWRY FAMILY. This Family com- 

 prises gasteropods which have the shell convolute, enam- 



Fig. 398- 



Fig. 399- 



Ovulum ovum, L. One half. New Guinea. 



Cypraa. One half. Indian Ocean. 



Figs. 400, 401. 



M<t 



elled, spire concealed, aperture narrow 

 and channelled at each end, the outer lip 

 inflected, and no operculum. There are 

 two hundred living, and one hundred rwa 

 fossil species. Marine. 



NATICID^, OR NATICA FAMILY. This Family con- 

 tains gasteropods which have the shell globular, few- 

 whorled, spire small, obtuse, aperture semi-lunar, and 



21 E E 



Britain. 



