1908.] NATURAL SCIENCES OF PHILADELPHIA. 51 



is an absolute synon5TTi of S. ovalis. (4) S. totteniana Lea and Binney 

 is absolutely identical with the typical S. ovalis Say. 



Explanation of Plate VII. 



Figs. 1-S — Succinea ovalis chittenangoensis n. subsp. 1, 2, No. 90,081 A. N. S. P.; 



3, No. 90,079; 4, 5, No. 90,080; 6, No. 90,083; 7, 8, No. 90,082. 

 Figs. 9~n— Succinea ovalis Say, Chittenango Falls. 9, 10, No. 90,085; 11, No. 



90,084. 



