Baker — The Molluscan Fauna of Western New York. 91 



will all prove to be synonyms of the present species, and 

 there are several other names which will probably have to be 

 added to this list: gyrina Say, elliptica Lea, aurea Lea, 

 Sayii Tappan, Troostiana Lea, fontana Hald., Hildrethiana 

 Lea, inflata Lea, cylindrica Newcomb, anatina Lea , Forsheyi 

 Lea, Saffordii Lea, Haunii Lea, parva Lea, Nicklinii Lea, 

 altonensis Lea, Febigerii Lea, Warrenana Lea, Halei Lea, 

 Whilei Lea, Grosvenorii Lea, Zato Tryon, prime ana Tryon, 

 oleacea Tryon, coniformis Tryon, deformis Currier and 

 albofilala Ancey. The above seems like a tremendous syn- 

 onymy, but it is probable that most, if not all, of these 

 names will stand as they are written. 



122. Physa ancillaria Say. 



Station 17. Rochester (Walton). This species is closely 

 related to heterosotropha , and it may be but a variety of that 

 species. It is always a wider and more robust form, and is 

 distinctly shouldered, the latter being a character lacking in 

 the former species. 



Genus Aplexa Fleming. 

 *123. Aplexa hypnorum Linne. Pittsford. 



Superorder Streptoneura . 



Order CTENOBRANCHIATA. 



Suborder Ortliodonta. 



Superfamily Taenioglossa. 



Family Pleuroceridae. 



Genus Pleurocera Rafinesque. 



124. Pleurocera subulare Lea. 

 Stations 5 and 6. Common. 



Genus Elimia H. and A. Adams, 1854. 

 Goniobasis Lea, 1862. 



*125. Elimia virginica Say. Erie Canal. 



