410 



MOLLUSCA : GASTEROPODA. 



cmula, Jlarpa, Oliva, etc., Figs. 559, 563, 560, 561); 

 the Conidse (Conus, etc., Fig. 562) ; the Yolutidre ( Valuta, 

 Mitra, Maryinella, etc., Figs. 564, 565) ; and Cypraeidte 

 (Cyj})>(jea, Trivia, etc., Figs. 566, 567). 



FIG. 561. 



Oliva pnrpl<i/ria, LamarcK. 

 Pauama. 



FIG. 504. 



Valuta musica, Linn. Reduced, 

 West Indies. 



FIG. 563. 



Ricinula arachnoides. 

 China. 



FIG. 562. 



Conus marmoreux, Gme- 



liu. China. 

 FIG. 565. 



Mitraepiscopalis, D'Org. Reduced. 

 Ceylon. 



Other prosobranchiates have the margin of the aperture 

 entire, and the operculum horny or shelly, and usually 

 spiral. These are called Holostoma, and are mostly plant- 



