176 College of Forestry 
One-half of the molluscan food consisted of Sphariwm 
and one group from the Illinois River (collected in Sep- 
tember and October) had eaten little else than Spherium. 
In another specimen, insects formed 37 per cent and mol- 
lusks 63 per cent. of the food. ‘Two specimens had fed only 
on fish and one specimen had eaten leeches to the extent of 
25 per cent. The mollusks eaten by this fish are tabulated 
below: 
Am~nicola, taken in May, August and October. 
Valvata tricarinata, taken in July. 
Vivipara, taken in October. 
Campeloma, taken in October. 
Physa, taken in August, September. 
Physa heterostropha, taken in October. 
Sphaerium, taken in May, September, October. 
Sphaerium sulcatwm, taken in August, September. 
Pisidium, taken in September. 
Uniondea, taken in May, October. 
Seven specimens of the Common Bullhead from Oneida 
Lake have been examined. These were taken at the follow- 
ing locations: 
No. 1, Shaw Bay, in thick vegetation, lamprey scar on 
back, September 6, 1915; No. 2, found dead in Oneida 
River, near Brewerton, September 4; Nos. 3 to 6. Lower 
South Bay, October 1%, 1914, caught in seine in shallow 
water; No. 7, Brewerton, near Davison’s Landing, October 18, 
1915, seined in shallow water. Only one of the seven was 
adult and this one had the stomach empty. The data for 
these is given below: 
No. 1 (122). 215 mill: long. Stomach empty. 
No. 2 (109). 110 mill.’ long. 
Mollusca. 2 Physa ancillaria warreniana 10 per cent. 
5 Vegetation and mud, mixed............. 90 per cent. 
No. 3 (309)¢° 56 mill. long. ee ah 
Crustacea: Entomostraca (Alona)~..... 25 per eent. 
Insecta. Fragments of nymphs (Odo- 
nate). ee @ Eipiraletevete fonevexe elaieinictals eictelele siete 25 per cent 
Alpes and mud? 22).c030f00 to. heb ies 5 <n OD Seem 
