The Relation of Mollusks to Fish in Oneida Lake 59 
Habitat 1. Small pool formed by caving in of bank, pro- 
tected from rapid moving water by portion of bank and by 
stones.( Field No. 204). 
Borrom: Muddy. Warer: 8-12 inches deep. 
VEGETATION: Algze. 
ANIMAL LIFE. 
MOLLUSCA, 
Planorbis trivolvis, on alge and Physa gyrina, on alge and dead 
dead leaves. leaves. 
Planorbis hirsutus, on alge and 
dead leaves. 
CRUSTACEA. 
Amphipod (Hyalella knickerbockeri), among leaves. 
INSECTA. 
Damsel-fly (Hnallagma species), Water beetle (Tropisternus gla- 
nymph. ber). 
Habitat 2. In Seriba Creek and its tributary, Frederick 
Creek, at and near junction of these two streams (Field No. 
ras 
$5). 
Borrom: Muddy. Warerr: 2-3 feet deep. 
Elliptio complanatus was the only mollusk observed and 
the crawfish Cambarus bartont robustus the only other 
invertebrate. 
Station XVII. Frepertck Creek, Constantia (FIELD 
No. 201). 
This creek is a tributary of Seriba Creek. Near its head 
the State Fish Hatchery buildings are situated. The creek 
varies in its physical relations, in some places forming quiet 
pools and in others running rapidly over stones. Near the 
hatchery buildings the bottom is composed of fine, impalpable 
mud. On and in this mud three species of mollusks were 
observed. 
Elliptic complanatus, common and Campeloma decisum, common and 
large. rusty in color. 
Strophitus edentulus, one dead 
shell. 
