The Relation of Mollusks to Fish in Oneida Lake 265 
Genus CampreLoma Rafinesque. 
31. Campeloma decisum (Say). Fig. 46, Nos. 6-8. 
This large snail was collected only at two stations, one a 
pond the other a creek. It is widely distribu‘ed, and is 
recorded from:Tomahawk Lake, Traverse Bay, Lake Michi- 
ean, Saginaw Bay, and Georgian Bay. It is abundant in 
New York State, and is noted by Beauchamp (under the old 
generic name Melantho) from Onondaga County. It is eaten 
by the Sheepshead. Campeloma (species not indicated) is 
eaten by the Dogfish, Common Red Horse, Channel-cat, 
Yellow Bullhead, Common Bullhead, and Sheepshead. 
32. Campeloma integrum (DeKay). Fig. 46, Nos. 2-4. 
Observed at thirteen stations, mostly on partly protected 
shores on a sandy bottom in shallow water. Occasionally a 
specimen or two occurs on a bouldery shore or point (as at 
station XX) but this is rare. It is abundant or common 
in many places. ‘This species is as widely distributed as is 
decisum, and is an abundant species in the waters of New 
York State, from which it was first described by DeKay 
under the name of heros (1843, p. 85). Specimens occur 
which resemble both the variety obesum and Campeloma 
rufum. More extended search may be the means of discov- 
ering these forms. It was observed to contain fully formed 
young in September. Jntegrum is listed by Beauchamp. 
Famity AMNICOLID2. 
Genus Ginwia Stimpson. 
33. (rillia altilis (Lea). Fig. 45, No. 39. 
Collected at three stations on a sandy bottom in shallow 
water, in bays usually open to the waves. A common and 
widely distributed species in New York State, listed by 
Lewis, Walton, Letson, and by Beauchamp from Onondaga 
County. 
