i;5() 



III ciliiii^f ;iiilli(ji'iti(',s for local di.sLrihnluni iIhj name of the perBon 

 (liKitrd n fci-.s U) Ihe locality as.sociiitcd tlicrewith in the above lists, 

 unless otherwise indicated. 



It had been hoped that the results of contemplated exjih^rations 

 ill the head waters of the Ohio in "Western New York ynight have 

 been reached in season to couliiin and extend the list of species 

 here presented. Though this hoi)e is unfortunately deferred, it is 

 scarcely to be expected that more than a very few species would 

 have been reached not already known to belong to this State. It 

 is, however, proba/jle, that an undescribed species of U7iio occurs in 

 the outlet of Chautauqua Lake; and that one, perhaps two species 

 of Pomatiopsis, nuiy be found in some of the western counties. 

 Hopes are entertained that certain species of land shells somewhat 

 indefinitely credited by Binney and Bland to this State, may be 

 found within its limits; no other record of them is available for 

 present purposes. Though this paper has been made as comprehen- 

 sive as could be expected from the material available, it is probable 

 that species have been omitted which are known to others to belong 

 to the fauna of New York. At some future day, perhaps, the State 

 of New York may authorize a revision of the work already pub- 

 lished under its patronage on this subject. When this Avork shall 

 be decided upon, the value of this and other similar papers will be 

 at once apparent. 



GASTEEOPODA PULMONATA. 

 Suborder Geophila. 



Family HELICIDAE. 

 Subfamily VITRININAE. 



YITRINA, Drap. 

 V. limpid, Gould. Aldrich; Lewis. 



HELICODISCUS, Morse. 

 H. lineatuSj *Sa^. Aldricli; Browu; Ingalls; Lewis. 



