80 Tram. Acad. Sci. of St. Louis. 



Superfamily Aulacopoda. 



Family Zonitidae. 



Genus Vitrea Fitzinger. 

 Zonites and Hyalina of authors. 



43. Vitrea arborea Say. 



Stations 1, 5, 11 and 13. Pittsford (Walton). Common 

 everywhere and with little or no variation. On the south 

 slope of station 13 it is exceedingly abundant, just back of 

 the Cobb house. 



44. Vitrea indentata Say. 



Stations 1 and 13. Apparently not common. 



45. Vitrea radiatula Alder. 



Station 5. Not as common as arborea. Specimens from 

 this locality are large and very fine. 



f46. Vitrea binneyana Morse.* 



Genus Omphalina Kafinesque. 



47. Omphalina fuliginosa Griff. 



Stations 1 and 5. Cayuga Lake Valley (Banks). This 

 species is found in great abundance at station 1, under dead 

 leaves and old logs; frequently found buried in the earth. 

 The specimens are very dark colored and highly polished. 



48. Omphalina inornata Say. 



Station 16. Pittsford (Walton). Cayuga (Banks). Ap- 

 parently not common. The single specimen collected is 

 very light colored. 



|49. Omphalina laevigata Pfr. 



f50. Omphalina friabilis Binney. 



* Names marked with a dagger are taken from Mr. Banks' paper in The 

 Nautilus 5: 137. This is a list of The Land Mollusca of the Cayuga Valley. 



