346 



REPORT OF NATIONAL MUSEUM, 1892. 



Diceca — Contin ued. 

 ORDER PECTINIBRANCHIATA— Continued. 



Marine. 



Rissoidae. 

 Skeneidss 



Brackish. 



Ri.ssoida' 



RissoidsB. 

 BytbiniidsB. 



Fossarida? 

 Littorinidse. . . 

 Pyramidellidse 



Euliiiiida- 



Styliferidse . . 



Ceritbiopsidae. 

 Cerithiidae ... 

 Planaxidse . . . . 



LittorinidsB. 



MelanopsidsB 



CeritbiidsB. 



Ceripb&siidae. 

 MelanopsidsB. 

 MelaniidsB. 



( lerithiidae. 



■id; 



Vermetidae — 

 Tenagodidae - . . 

 Turritcllida' . . . 

 Trichotropidse 

 Hipponicidae. . . 



Capulidae 



Calyptreidas . . . 

 Neiitopsidae . . - 



Onnstidae 



Strombidae 



Aporrbaidae . . 

 Pediculariidae - 

 Ampbiperasida 



CypraBidsa 



Triviidae 



Mavseniidae — 



Velutinidse 



Naticidse 



Pyrulidte 



Doliidas 



Cassididae . .... 



Ranellidae 



Tritonidae 



lantliinidiB 



Solariidae 

 Scalariidae 



Atiantidae 



Carinariida?. . . 

 Pterotraehseidas 



ORDER HETEROPODA. 



ORDER RHIPHIDOOLOSSA. 



Neritidae Neritidaa 



Roteliidae 



Rotellidae . 



V i ; 1 1 : 1 : " . 



