704 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Margaritana, Shumacher. 



complanata, Lea.— Nemeha Eiver. 



marginata, Say. — Elkhoru, Bow, and Nemeha Rivers. 

 Anodonta, Cuvier. 



corpulenta, Coop. — Bow River aud Iowa Creek. 



danielsi, Lea. — Nemeha, Blue, aud Republicau Rivers. 



decora, Lea. — Nemelia River and Oak Creek. 



edentula, Say. — jSTemeha Ri\^er. 



ferussaciaiia, Lea.— I:^emeha River and Middle Creek. 



footiana, Lea. — Bow River. 



^randis, Say. — Elkhorn, Bow, Blue, aud Nemelia Rivers. 



imbecilis, Say. — Nemeha River. 



marryatana, Lea. — Bow River, Iowa and Elk Creeks. 



ovata f, Lea. — ISTemeha River. Specimens all dead. 



plana, Lea. — ifemeha River. 



suhorhiculata, Say. — Elklioru and Blue Rivers. 



undulata, Say. — Nemeha River. 



loardiana f, Lea. — Blue River. Found only a dead, broken specimen 



