Baker — The Molluscan Fauna of Western New York. 93 



Family Amnicolidae. 



Genus Amnicola G. & H. 



129. Amnicola limosa Say. 

 Stations 6 and 9. Genesee River (Walton). Common. 



*130. Amnicola porata Say. Erie Canal. 



*131. Amnicola orbiculata Lea. 



*132. Amnicola pallida Halcl. 



*133. Amnicola granum Say. 



134. Amnicola lustrica Pilsbry. Station 5. Rare. 



Genus Cincinnatia Pilsbry. 



135. Cincinnatia obtusa Lea. 

 Stations 6 and 9. Common. 



136. Cincinnatia cincinnatiensis Anthony. 

 Station 9. Only a single specimen found. 



Genus Gillia Stimpson. 



137. Gillia altilis Lea. 



Station 9. Erie Canal (Walton). Rather common. 



Genus Somatogyrus Gill. 



138. Somatogyrus subglobosus Say. 

 Station 9. Common. 



Family Valvatidae. 

 Genu9 Valvata Miiller. 



139. Valvata sincera Say. 



Stations 5, 6 aud 9. Erie Canal (Walton). Very common, 

 and subject to considerable variation. 



140. Valvata tricarinata Say. 



Stations 3, 5 and 9. Very common and exceedingly vari- 

 able, being either uni-, bi- or tricarinate. 



