218 College of Forestry 
SupPpLEMENTARY Norte. 
Since the paper was completed, Prof. M. W. Blackman has 
called my attention to a paper on the food of fish by A. S. 
Pearse (1915. On the Food of the Small Shore Fishes in 
the Waters near Madison, Wisconsin. Bull. Wis. Nat. Hist. 
Society, XIII, No. 1, pp. 7-22). Upwards of 403 speci- 
mens were examined representing 17 species, of which seven 
were young of larger species (black bass, rock bass, ete.) and 
the others included young and adult of small fishes (min- 
nows, brook silversides, etc.). Three species were observed 
to feed upon Mollusca. One fish, the stickleback, is appar- 
‘ently here first recorded as using mollusks for food, increas- 
ing the number of mollusk-eating fishes, discussed in this 
present paper, to 47. The ratios of molluscan food for the 
three species is indicated below. 
Umbra lima (Kirtland), Mud Minnow. Pearse (p. 19) 
examined 60 specimens ranging in size from 30.4 to 105 
mill., and found Mollusea (Planorbis and Spheervum ) to 
make up .9 per cent. of the total food. In ten specimens 
from one habitat these genera made up 2.5 per cent. 
Fundulus diaphanus menona Jordan and Copeland (Top 
Minnow). Pearse (p. 16) examined 49 specimens ranging 
in size from 28.2 to 37 mill., and found Mollusca (Plan- 
orbis) to comprise .1 per cent. of the food. 
Hucalia inconstans (Kirtland), Brook Stickleback. Pearse 
(p. 19) examined 50 specimens ranging in size from 28.4 to 
58.7 mill., the Mollusea forming 6.4 per cent. of the food, 
the genera present being Physa, Planorbis and Sphevriwm. 
Forbes (1883, a, p- 68) gives the animal food of five speci- 
mens as about equally divided between insects and 
crustaceans. . 
et 
