THE NAUTILUS. O 



Operculum with the nucleus at about the lower sixth of the 

 total length. 



Distribution. — Ohio river system in western Pennsylvania. 

 Ohio River at Coraopolis (type locality ; S. N. Rhoads, Sept. 

 1898); Neville Island, Allegheny Co.; Beaver River below 

 Wampum (Rhoads); Allegheny River (E. A. Randall, 1868); 

 Pittsburgh (H. S. Stupakoff, 1895). Type and cotypes No. 

 73954 A. N. S. P. 



While related to G. depygis (Say) and G. livescens (Mke.), 

 this species is readily known by its short spire, bright olivaceous 

 yellow color and the strong, persistent cuticle. It was found 

 in abundance by Mr. Rhoads, and was listed by him as Gonio- 

 basis depygis (Nautilus XII, April, 1899, p. 137). Though I 

 have not seen the specimens, it is apparently what Dr. Ortmann 

 catalogued as Goniobasis translucens Anth. (Proc. Amer. Philos. 

 Soc, Vol. 52, 1913, p. 328). If so, it occurs as far upstream 

 as Warren Co., Pa. 



Some individuals have two rather wide carob-brown bands, 

 occupying the middle of the spaces above and below the per- 

 iphery. Sometimes there are narrow bands very near the 

 suture and columella, the latter visible inside. 



THE FBESH-WATEB MOLLXJSCA OF ONEIDA LAKE, NEW TOBK. 



BY FRANK C. BAKER. 



Oneida Lake lies near the center of New York State in lati- 

 tude 43" north and longitude 75° west. Oswego and Oneida 

 counties border the lake on the north and Onondaga and Madi- 

 son counties on the south. It is 27 miles southeast of Lake 

 Ontario. The lake is oriented almost directly east and west, 

 which is the longer axis, and is 21 miles in length by 5,50 

 miles in greatest width. The level of the lake is 369 feet above 

 the sea or 124 feet above Lake Ontario. The greatest depth 

 recorded is 55 feet, which occurs about one and a half miles 

 southeast of Cleveland. The shores are relatively very low, as 

 the lake is in the bed of an ancient glacial lake, lacking the 



