The Relation of Mollusks to Fish in Oneida Lake 171 
Semotilus bullaris (Rafinesque). Dace; Silver Chub; Fall- 
fish. 
Two specimens of this fish, caught near Constantia, 
August 31, 1915, were examined. No mollusks were 
observed, and it is not known to feed upon this class of 
animals. 
No. 1 (76) 245 mill. long. Stomach and intestine empty. 
No. 2 (76) 280 mill. long. 
Crustacea. 2 Cambarus bartoni robustus..... 65 per cent. 
Batrachia. 1 small frog, partly digested..... 35 per cent. 
A related species atromaculatus, is known (Forbes and 
Richardson, p. 123) to eat alge and miscellaneous vegetable 
matter (25 per cent.), small fishes, grasshoppers, ants, cater- 
pillars, beetles and various other terrestrial insects, Corisa, 
dipterous larvee and other aquatic insects, and crawfishes. 
Abramis chrysoleucas (Mitchill). Golden Shiner; Roach ; 
Bream. 
Food varies in different localities (Forbes, 1883, a, p. 81). 
In the Pecatonica River, Illinois, the food was entirely mol- 
luscan, consisting principally of Valvata tricarimata and 
Planorbis deflectus, taken in May. Fishes from the [llinois 
River at Pekin had eaten largely of mollusks but principally 
of Entomostraca. As a whole the diet may be expressed as 
follows: / 
Weretationramdimitdis tects ste cincreioce fiers Nels tie ore 50 per cent. 
Crustaceay.... cree s<jerette, ate Sw chap tie ete ge 15 per cent. 
MOMUSIKS:7. 3) <5) - 5 iets sfopminga- > senep oh heb 14 per cent. 
NIST RSEGUSEN see ee onc oncila © ores os cre. sje eae hs aycieiens <BaS ahs 6 per cent. 
WHSCOMANEGUSS (2. ely ste datas chee ci siceste's ShahetaKe a's) cues oe 15 per cent. 
Eighteen specimens from Oneida Lake have been examined, 
six of which contained food. In this lot mollusks formed but 
a small percentage of the total food, insects totalling 97 per 
cent., caddis-fly larve predominating. Fresh material is 
needed to satisfactorily determine the food percentages of 
this interesting fish. The data obtained from the eighteen 
specimens is given below. 
