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 77 



73 V 78 



74 V 



76 



81 



74 







75 







75 







75 







75 







75 



xxxvi 



348 



75 







75 







75 







76 



V 



82 



83 



77 



V 



82 



77 







78 



V 



85 



78 



V 



86 



78 



V 



90 



79 



V 



87 



80 



V 



88 



80. 



V 



89 a,b 



81 



xsxvi 



346 



81 







81 







81 







81 







81 







Kame. 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. Philadelphica Lea. 

 jugularis Say. 



L. stagnalis Kirtland. 

 appressa Say. 

 obrussa Say, e. 1. Philadelphia. 



L. decidiosa Hald. ? 

 ferruginea Hald., 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 Hald., e. 1. Ohio? Missouri. 



Pbysa heterostropha Say. 



Limnea heterostropha Say. 

 planorbula De Kay. 



Bidla Jluviatilis Say ? 

 cylindrica Newcomb, ined. 

 eliiptica De Kay. 



P. cylindrica Lea. 

 plicata De Kay. 

 obesa De Kay. 

 ancillaria Say. 

 gyrina Say? 

 glabra De Kay. 

 aurea Lea, 

 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. 



