Baker — The Molluscan Fauna of Western New York. 75 



In the following list the writer has deviated from the beaten 

 path which has been trodden by conchologists in the past, but 

 he believes that the recent conclusions of well-known students 

 should be recognized, and adopted, wherever sufficient evi- 

 dence is shown of their validity. Thus in the Unionidae, the 

 writer has followed Mr. Charles T. Simpson ; in the Pulmonata 

 Mr. Henry A. Pilsbry ; and in the Viviparidae Prof. R. Ells- 

 worth Call. References to the publications of these gentle- 

 men will be found elsewhere. 



Class PELECYPODA. 



Order PRIONODESMACEA. 



Suborder Naiadacea. 



Family Unionidae.* 



Genus Anodonta (Bruguiere em.) Lamarck. 



1. Anodonta Lewisii Lea. 

 Station 10. A single small specimen collected. 



*2. Anodonta salmonia Lea. Erie Canal. 



3. Anodonta implicata Say. Charlotte. 



*4. Anodonta imbecilis Say. Irondequoit Creek. 



*5. Anodonta fragilis Lam. Pittsford. 



*<3. Anodonta fluviatilis Dillw. Allen's Creek. 

 *7. Anodonta benedictii Lea. Erie Canal. 

 *8. Anodonta excurvata DeKay. Pittsford. 



* 



Genus Alasmodonta Say. 1819. t 



9. Alasmodonta marginata Say. 



Station 10. Does not seem to be common in the Genesee 

 River. Erie Canal (Walton's list). 



* See Simpson, Proc. U. S. National Museum 18 : 295-343. 1895. 



t The present classification of the Unionidae is that of Mr. Charles T. 

 Simpson, which will be published in the writer's report on The Mollusks 

 of Chicago and Vicinity, now in press. 



