106 



BIBLIOGRAPHY OF 



Page. Plate. Fig. 



70 iv 73 



71 iv 71 a, b 



71 iv 65, 72 a, b 



72 iv 74 a, b 



72 iv 75 



73 iv 

 73 v 



74 v 



74 

 75 



75 

 75 

 75 



75 xj 

 75 



75 

 75 



76 v 



76 v 



81 



348 



82 



83 



82 



Name. Locality. 



Limnea gracilis Jay. 

 humilis Say. 



L, modicella Say? 

 reflexa Say. 



L. exilis Lea. 

 Linsleyi De Kay. 

 columella Say. 



L. macrostoma Say. 

 acuminata Adams. 

 emarginata Say. 

 desidiosa Say. 



L. acuta Lea. 

 casta Lea ? 



L. Philadelphia Lea. 

 jugularis Say. 



L. stagnahs Kirtland. 

 appressa Say. 

 obrussa Say, e. 1. Philadelphia. 



L. decidiosa Hald. ? 

 ferruginea Ilald., e. 1. Oregon, 



rugosa Valenciennes, e. 1. Mexico, 



attenuata Say, e. 1. Mexico, 



expansa Hald., e. 1. Vermont. 



solida et apicina Lea, e. 1. Oregon. 

 bulimoides Lea, e. 1. Oregon. 



vitrea Hold., e. 1. Ohio? Missouri 



Pbysa heterostropha Say. 



Limnea heterostropha Say. 

 planorbula De Kay. 



Bulla jluviatilis Say ? 

 cylindrica Neivcomb, ined. 

 elliptica De Kay. 



P. cylindrica Lea. 

 plicata L>e Kay. 

 obesa De Kay. 

 ancillaria Say. 

 gyrina Say? 

 glabra De Kay. 

 aurea L^ea. 

 elongata Say. 



pomilia Conrad, e. 1. Alabama. 



Integra Hald., e. 1. Indiana. 



concolor Hald., e. 1. Oregon. 



Sayii Tappan, e. 1. (no description given). 

 globosa Hald., e. 1. • Virginia. 



