The Relation of Mollusks to Fish in Oneida Lake 159 
taken from the examination of 21 specimens, between April 
and October. 
ELST SBI Aa Oe ae oe hc te I 25 per cent. 
MRMEEUED CS: Ao. s re ete feel hoe eS aetie 3 40 per cent. 
SUCRE ae ori hee eae Dink Sinicdiay'y ny havatese 30 per cent. 
LS EE egpainestial arenes pe 58 Cee oe ae arn 2 per cent. 
Of the mollusks three genera were recognized but the 
species are not indicated: 
Vivipara, noted in August. Spherium, noted in September. 
Planorbis, noted in August. 
Bean (1903, p. 66) adds Lymnaea, Melantho (Campe- 
loma), Physa, and Valvata. Marshall and Gilbert (1905, p. 
516) examined 13 specimens, 9 of which contained food, 7 
contained crawfishes, and 2 minnows. Cestode and other 
worms were found in every fish. 
* Hiodon tergisus LeSueur. Toothed Herring ; Mooneye. 
“ Feeds on insects and their larvee, mollusks and small min- 
nows ” (Forbes and Richardson, p. 44). 
* Dorosoma cepedianum (LeSueur). Gizzard Shad; Hick- 
ory Shad. 
The food of this species is mostly vegetable debris con- 
tained in the mud of the bottom. Usually about 4 per cent. 
of animal matter is present, consisting of Coleoptera, Ento- 
mostraca, univalve and bivalve (Spheriwm) mollusks. One 
specimen contained 25 per cent. of Entomostraca (Forbes, 
1888, a, p. 438). 
* Coregonus clupeaformis (Mitchill). Common Whitefish. 
Ward (1896, p. 21) found the food of the whitefish to 
consist of : 
ristaGeah tert pian Pats ees ints et. = SaSee 63 per cenit. 
{IGN USTED 3 ARERR Be Se cn gel Sp Sanaa an ie ea Poe 26 per cent. 
SET a UI ie ae hy ap le (eel i cae ia 3 per cent. 
SUPE eet Bee Pe be Ce ees one? PER AE tee a Ais. 2 per cent. 
Minccellamenniss ai. 5) cise sde. spac ahae  siaise 2 elo wese ae 1 per cent. 
From the literature it is at once seen that the food taken 
by the Whitefish varies in different localities. Thus Ward 
