NORTH AMERICAN CONCHOLOGY. 



101 



Page. Plate. 



9 V 



Fig. 

 94 



90 



Tritonidae. 



Name. Localitf. 



Tritonia Reynoldsi Couth. 

 T. arborescens Gould. 



Olaucidae. 



Eolidia Bostoniensis Couth. 

 Eolis Bostoniensis Couth. 



rudibranchialis Gould? 

 diversa Couth. 



Eolis diversa Coutli. 

 gymnota Couth. 



Eolis ( Tergipes) gymnota Couth. 

 Cavolina salmonacea Couth. 

 Eolis salmonacea Gould. 

 Filurua (n. g. ) dubius De Kay. 



INFRABRANCHIA. 



Ancylus rivularis Say. 

 calcarlus De Kay. 

 fuscus Adams. 



tardus Say, e. 1. Wabash river, 



filosus Conrad, e. 1. Alabama. 



Nuttallii Hald. Oregon, 



diaphanus Hald. Ohio, 



parallelus Hald. 



14 



15 

 15 

 16 



16 

 17 

 17 



18 

 18 

 18 

 19 



19 



100 a, b 



101 

 102 



XXXV 

 XXXV 

 XXXV 



XXXV 



XXXV 

 XXXV 



334 

 326 

 329 



335 



327 



328 



TE CTIBRANCHI A. 

 Aceridae. 



Bulla insculpta Totten. 

 Gouldii Couth. 

 obstricta Gould. 

 Bulla Jluviatilis Say, is referred doubtfully to Physa 



planorbula De Kay. 

 Bulla lineolata Couth. 

 triticea Couth. 

 debilis Gould. 

 Bulla fontinalis Say, referred doubtfully to a Physa. 

 Bulla hiemalis Couth. 

 oryza Totten. 

 canaliculata Say. 



Volvaria canaliculata Say. 

 Bullina canaliculata Say. 

 eolitaria Say, e. 1. Southern coast. 



Bulla insculpta ? 



