The Relation of Mollusks to Fish in Oneida Lake 65 
INSECTA, 
Caddis-fly larve (Helicopsychke borealis), common on shells of Hllip- 
tio complanatus. 
HIRUDINEA. 
Leech (Placobdella phalera, probably juv.) 
Habitat 3. Southeast side Muskrat Bay (Field Nos. 246, 
247). 
Borrom: Sandy with oceasional boulders. Water: 2 
to 3 feet deep. 
VecEeration: Zonal. 
Zone A. Shore, water 10-24 inches deep. 
Narrow-leaved Cat-tail (Typha  Broad-leaved Arrow-head (Sagit- 
angustifolia) . taria latifolia). 
Bur-reed .(Sparganium eurycar- American Bulrush (Scirpus ameri- 
pum). canus) . 
Zone B. More open water 2-3 feet deep. 
Pickerel-weed (Pontederia cor-  Sweet-scented Water Lily (Cas- 
data). talia odorata). 
Lake Bulrush (Seirpus occiden- Cow Lily (Nymphwa advena). 
talis) . Floating Pond-weed (Potamogeton 
natans). 
SUBMERGED VEGETATION. 
Water Weed (Hlodea canadensis). Water Celery (Vallisneria spira- 
Hornwort (Ceratophyllum demer- she 
sum). Clasping-leaved Pond-weed (Pota- 
Water Milfoil (Myriophyllum spi- mogeton perfoliatus) . 
catum). Stonewort (Chara species). 
ANIMAL LIFE (IN ZONE B). 
MOLLUSCA. 
Anodonta cataracta, 1 juvenile 9 Galba catascopium, common, on 
mill. long. stray boulders. 
Spherium striatinum, infrequent. Planorbis campanulatus, on under 
Amnicola lustrica, common, adult surface of lily leaves. 
and young. 
INSECTA. 
Caddis-fly larvee (Helicopsyche borealis). 
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