The Relation of Mollusks to Fish in Oneida Lake 45 
Zone C. 
Borrom: Sandy silt. Warrer: 2-4 feet deep. 
Sweet-scented Water Lily (Casta- Pickerel-weed (Pontederia  cor- 
lia odorata). data). 
Cow Lily (Nymphaea advena). American Bulrush (Scirpus amer- 
Pond-weed (Potamogeton natans). 1Ccanus ) . 
In one habitat, the first west of Milton Point, the bottom 
was muddy, as was also the case at the mouth of the creek. 
ANIMAL LIFE IN ZONE C. 
Spherium vermontanum. Gillia altilis. 
Pisidium variabile. Somatogyrus subglobosus. 
Pisidium compressum levigatum. Amnicola lustrica. 
Pisidium species. Valvata bicarinata normalis. 
Pisidium species. Planorbis hirsutus. 
Campeloma integrum, young. Planorbis campanulatus. 
Mollusks were here (Zone C) quite abundant. Among 
the Campeloma, one specimen was reversed and one of the 
shells had a rosy tint like Campeloma rufum. 
Zone D. (Field Nos. 224, 251.) 
Borrom: Sand or gravel with occasional boulders. 
Water: 2-4 feet deep. 
VEGETATION. 
Pickerel-weed (Pontederia cor- Floating Pond-weed (Potamogeton 
data). natans) . 
American Bulrush (Scirpus ameri- 
canus). 
Zone D occurs conspicuously in the first indentation of the 
shore west of Milton Point, where Zone C is in about 2 feet 
of water. The plants occur in patches. Animal life is here 
abundant, the mollusks living on or between the stones (Fig. 
1G:).. 
Elliptio complanatus, common. Gillia altilis, adult and young, 
Spherium vermontanum, rare. common. 
Pisidium compressum, rare. Physa ancillaria warreniana, 
Campeloma integrum, rare. young, uncommon. 
Amnicola lustrica, rare. Galba catascopium, adult and 
young, uncommon. 
