Tin-; NAUTILUS. 137 



THE LAND MOLLUSCA OF THE CAYUGA LAKE VALLEY. 



I5Y NATHAN KANKS. 



Cayuga Lake is one of a series of lakes iu central New York. 

 The region around its upper end is very interesting, not only on 

 account of its beautiful and varied scenery but also because of its 

 rich flora and fauna. The hills are high, and there are numerous 

 streams which have worn deep gorges in the hillsides. At the head 

 of the lake is a large marsh. Not far from the lake (about ten 

 miles from Ithaca) are several Sphagnum bogs. The varied natural 

 conditions favor an augmentation of species ; and, 1 think for a 

 locality in the northern part of tlje U. S., the following list is mod- 

 erately large. Some of the smaller species are not represented, 

 ])erhaps because I did not look sufficiently close for them. Many 

 notes were made on local variation, distribution and the habits of 

 the more common species. The fresh water shells were also col- 

 lected and made a good showing. In the list I follow nearly the 

 arrangement of Pilsbry's list. 



1. Selenites concava Say. Common. 



2. Limax maxim us Linn. Uncommon. 



3. Limax flavus Linn. More common. 



4. Limax carapestris Binn. Quite common. 

 '5. Vitrina limpida Gld. Rare. 



6. Zonites fuliginosus Griff. Common. 

 y'l . Zonites friabilis Binn. Rare. 

 kJ^ 8. Zonites Itevigatus Pfr. Uncommon. 

 C^^"^ Zonites intertextus Binn. Frequent. 

 ^„,10. Zonites ligerus Say. Uncommon. 



11. Zonites inornatus Say. Frequent. 



12. Hyalina nitida Mull. Not uncommon. 



13. Hyalina arboi'ea Say. Very common. 



14. Hyalina radiatula Alder. Frequent. 



15. Hyalina indentata Say. Frequent. 

 ~V16. Hyalina limatula Ward. Uncommon. 



17. Hyalina minuscula Binn. Frequent. 



18. Hyalina milium Morse. Rare. 



19. Hyalina binneyana Morse. Rare. 



20. Conulus fulvus Drap. Common. 



21. Gastrodonta multidentata Binn. Frequent. 



22. Tebennophorus carolinensis Bosc. Common. 



23. Tebennophorus dorsalis Binn. Fi'equent. 



24. Patula alternata Say. Very common. 

 /25. Patula perspectiva Say. Uncommon. 



26. Patula striatella Anth. Frequent. 



