The Relation of Mollusks to Fish in Oneida Lake 165 
Insecta, 5 mud, and 1 was empty. Figuring the food of the 
three adult specimens, we find the percentages to be: 
Mpg GHG Plant, TEMAING). 2 io' < <.o2 cies we a 0s be t= 49 per cent 
MUreRU SC amet re farce c srcy stoLNecsva/erRarevaun tel 3161 oleae AE ox 30 per cent. 
IDDRGCLDS ‘axe pia clgtioo orig. te CoO ocd Loom Onony waco 21 per cent. 
The data gathered from the 13 specimens is given below. 
No. 1 was collected in Scriba Creek below the bridge, dead, 
injured by lamprey; No. 2, Brewerton, near Davison’s Land- 
ing, seined in shallow water, October 18, 1915; Nos. 3-5 same 
locality, October 5; Nos. 6-11, Lower South Bay, seined in 
shallow water, October 31; No. 12, Constantia; No. 13 pur- 
chased in market, caught in Oneida Lake. 
ADULT FISH (3 specimens). 
No. 1(75) 300 mill. long. 
Mollusca. Ammnicola lustrica, many....... 
Planorbis, hirsutus, U..-..--. eh ee TEA 
Mud and plant remains, alge.............. 50 per cent. 
No. 12. 240 mill. long. 
Insecta. Fragments of Odonate nymphs..... 5 per cent. 
Mud-and “plant, ‘renmrains. 22/200 oo. Stat 95 per cent. 
No. 13. 390 mill. long. 
Mollusea. Valvata tricarinata 114 (1-3 
mols long) 5-5 ciadetsaeetas 
A icola lustrica, 17 —3 mill. : 
FH Nn VER OE 
Galba catascopium, 1 (1% mill. 
Tong) eyact Sst. 4-a eae aoe a 
Mollusea. Pisidium henslowanum, 25 \ 
(many fragments) ........ : 20 per cent. 
Spherium — vermontanum, 
(youn) steve sy we 
Hewagenia larve, 4: .5-<.-2...- } 
Insecta. Chironomid larve, 420.......... 50 per cent. 
Caddis-fly (Helicopsyche borealis) ) 
Caddis-fly, fragments of cases... { 
Bryozoa. Plumatella statoblast, 1. 2 per cent. 
Mud and vegetable remains, very small amount. 
8 per cent. 
JUVENILE FISH (10 specimens). 
No. 2(314) 85 mill. long. 
Crustacea: Cyclops, a few.............. 
Alone, abundant’... 22). - = = 
Plants. Alge and plant fragments......... 50 per cent. 
50 per cent. 
