THE NAUTILUS. 



69 



fiiliginosus GrifF. 



intertextiis Binu. 



exiguus Stimp. 



arboreus Say. 



indentatus Say. 



liniatulus Ward. 



nitidus Miill. 



viriduliis Say. 



fulvus Drap. 



minusculus Binn. 



petrophilus Bland ? 

 Strobila labyrinthica Say. 

 Helicodiscus lineatus " 

 Valloiiia pulchella Miill. 

 Punctum pygmaeum Drap. 

 Pupa contracta Say. 



pentodon " 



corticaria " 



fallax 



armifera " 



curvidens Gld. 

 Vertigo ovata Say. 



milium Gld. 



tridentata Wolf. 



bollesiana Morse. 



gouldii Binn. 

 Carychium exiguum Say. 

 Valvata sincera Say. 



tricarinata " 



Amuicola porata Say. 



cincinnatiensis Anth. 



Sayan a " 



Pomatiopsis lapidaria Say. 

 Bythinella attenuata Hald. 

 Melantho Integra Say. 

 Bulimus dealbatus Say. 

 Ancylus rivularis Say. 

 Limnaea reflexa Say. 



palustris Mull. 



desidiosa Say. 



humilis " 



catascopium Say. 



caperata " 



Physa gyriua Say. 



heterostropha Say. 

 Bulinus hypnorum L. 

 Planorl)is trivolvis Say. 

 " var. fallax. 



bicarinatus Say. 



companulatus Say. 



parvus " 



vSegmentina armigera Say. 

 Succinea obliqua Say. 



ovalis Gould. 



avara Say. 



" var. vermeta. 

 Sphaerium sulcatum Lam. 



solidulum Prime. 



occidentale " 



striatinum Lam. 



truncatum Lins. 

 Pisidium abditum Hald. 

 Unio rubiginosus Lea. 



occidens " 



luteolus Lam. 



subovatus Lea. 



gibbosus Bar. 



pressus Lea. 



gi-acillis Barr. 



phaseolus Hild. 



glans Lea. 



radiatus Lam. 



cocineuus Hild. 



spatula tus Lea. 



nigerrimus " 



ligamentinus Lam. 



plicatus Les. 



uudulatus Bar. 



nov-eboraci Lea. 

 Margaratana marginata Say. 



calceola Lea. 

 , deltoidea " 



