The Relation of Mollusks to Fish in Oneida Lake 169 
It was adult, measuring 16 inches (400 mill.) in length. The 
stomach was empty, but the intestine contained a small quan- 
tity of material, in an advanced state of digestion. From 
this material the following groups were denen: 
Insecta. Chironomid larve, 14. 
Hexagenia nymph, | 
Plants. Filamentous alge. Small amount. 
More material is necessary to determine the food habits of 
this species in Oneida Lake. It is interesting to note that 
DeKay, in his fish report, names the Red-horse of Oneida 
Lake Catostoma onetda and ealls it the Oneida Sucker (1842, 
p- 198). Bean (1902, p. 284) states that the food consists 
of mollusks and insects. 
} Moxostoma breviceps (Cope). Short Headed Red Horse. 
The food of this species, judged from 6 specimens exam- 
ined by Forbes, appears to be about half Mollusca and half 
insects, mostly Chironomus larvee and pup. ‘Two genera of 
mollusks were identified, Vivipara and Spherium, both taken 
in June. It is to be noted that in Forbes (1888, a) paper on 
the food of fresh-water fishes, macrolipidotum, page 442, 
now aureolum, while awreolum, page 444, is now re 
{ Placopharyna duquesnei (LeSueur). Sucker. 
Little is known concerning the food of this sucker, which 
does not inhabit the waters of New York State. Forbes 
(under the specific name carinatus) records the food of three 
specimens, two of which were adult. This data appears below 
(1888, a, p. 442): 
No. 1. Mollusca. Valwvata tricarinata ............. \ 
AUN COLO saroy ot iah Va soys chek’ SIE STs bhakh 
Insecta. Hydrophilidee Tsay Sass tres, 
Ephemeride larvee (mostly Canis) . 
Chigenomus Varve).. 3:8 cox Mavis tae 
Crustacea. Allorchestes. 1 specimen........ 
60 per cent. 
35 per cent. 
DRAGS, ACTUAL. asc, shee cctere cues @. «10,1 St) Sines says oi 5 per cent. 
No. 2. Mollusca. Valvata tricarinata ............. 
JT UTRONM.. Blsso io ben ccs sce oedac 5 per cent. 
SWAT UTE E OM atone DOD OD OO OCUEL 
