NORTH AMERICAN CONCHOLOGY. 



109 



Page. 



268 

 268 

 268 



268 



269 



269 



269 

 209 



269 

 269 

 269 



269 



269 

 269 



269 

 270 

 270 

 270 

 270 

 270 

 270 



270 

 271 



Name. 

 Lymnaea appressa Say. 

 attenuata Say. 

 caperata Say. 



var. L. umbilicata Adams. 

 catascopium Say. 

 L. cmarginata Say. 

 var. L. Virgineana Lam. 

 cornea Val. 

 pinguis Say. 

 decollata Mighels. 

 columella Say. 



var. L. acuminata Adams. 

 ckalybea Gould. 

 coarctata Lea. 

 macrostoma Say. 

 desidiosa Say. 

 var. L. acuta Lea. 



Philadelphica Lea. 

 elodes Say. 

 elongata Say. 



L. umbrosa Say. 

 expansa Hald. 

 ferruginea Hald. 

 fragilis Linn, (var.) 

 L. palustris Dr. 

 L. speciosa Ziegl. 

 var. L. corvus Parr, 

 gracilis Jay. 



Acella gracilis Hald. 

 Grcenlandica. 

 humilis Say. 



var. L. modicella Say. 

 parvai Lea. 

 jugularis Say. 

 Lindsleyi Dc Kay. 

 megasoma Say. 

 Nuttalliana Lea. 

 obrussa Say. 

 pallida Adam*. 

 reflexa Say. 



var. L. exilis Lea. 

 solida Lea. 

 umbrosa Say. 



var. L. elongata Say. 



Locality. 

 Vermont. 

 Mexico. 

 Ohio. 



New Bedford. 

 New York. 



Virginia. 



Wisconsin. 

 Unity, Maine. 

 Massachusetts. 

 Woburn. 

 Cambridge. 

 Rhode Island. 

 Cayuga lake, N. 

 New York. 

 Massachusetts. 

 Pennsylvania. 

 New York. 

 New York. 



Vermont. 

 Oregon. 

 New York. 



Vermont. 



Greenland. 



New York. 



Maine. 



Ohio. 



New York. 



Connecticut. 



N. W. Territory. 



Oregon. 



Philadelphia. 



Lake Champlain. 



New York. 



Ohio. 



Oregon. 



New York. 



Connecticut. 



