58 THE NAUTILUS. 



11. Polygyra palliata Say.j 



12. Pol 'y 'gyro tridentata Say. J 



12a. Polygyra tridentata var. juxtidens Pilsbry.j 



\2b. Polygyra tridentata var. bidentata Baker. J 



13. Polygyra monodon Rackett.j 



Nos. 9 to 13 were collected on a well wooded limestone hill, well 

 watered. 



14. Bifidaria armifera Say.* 



15. Pupa muscorum Linne, Auburn. Common in damp grass 

 throughout the city, often found in private grounds. 



16. Vertigo milium Gould,** 1880. 



17. Cochlicopa lubrica Miiller,** 1880 and 1876, on driftwood in 

 Owasco River at Auburn. 



18. Omphalina fuliginosa Griff. J 1883. 



18. Vitrea hammonis Strom,** April, 1882. 



20. Conulus fulvits Mull-.,** on roots of grass near edge of river, 

 April, 1882. 



21. Zonitoides arboreus Say .% 



22. Zonitoides nitidus Miiller,** April, 1882. 



23. Gastrodonta ligera Say,** April, 1882. 



24. A griolimax catnpestris Binney. 



25. Pyramidula alternata Say,* very abundant in low meadows, 

 under bark of trees and the under side of logs where the ground is 

 partially shaded. 



26. Helicodiscus lineatus Say.j 



27. Succinea retusa Lea, ft on l°c s ana * trunks of trees near high 

 water mark, July, 1880. 



28. Succinea avara Say, ft duly, 1880, in company with the above. 



29. Limncea palustris Miiller, ft 1884. 



30. Limncea emarginata Say, ff ** also in Owasco River, at foot 

 of lake, 1880, and April, 1882. 



31. Limncea desidiosa Say, J J on weeds, 1880. 



33. Planorbis bicarinatus Say, f, 1881, Port Byron, 1883. 



34. Planorbis trivolvis Say,| old and new outlets, 1880, Port 

 Byron. 



35. Planorbis campawtlatus Say,* 1882, also in brook emptying 

 into lake at Cascade. 



36. Planorbis parvus Say, * on big dam. 



37. Pliysa heterostropha Say,* Port Byron, 1879 to 1882. 



