Pearse—The Parasites of Lake Fishes, 
177 
Nematoda 
Ascaris sp.? 
An Ascaris that could not be identified was found in the in¬ 
testine of a rock bass in Lake Geneva. 
Ascaris angulata Eudolphi? 
An ascarid that perhaps belonged to this species was taken from 
the intestine of a pumpkinseed caught in Lake Michigan. 
Ascaris lahiata Eudolphi 
Found in the intestine of the rock bass in Lake Mendota. 
Ascaris lucii Pearse 
This species was the commonest intestinal ascarid found. Lake 
Geneva: pickerel; Lake Mendota: rock bass, pickerel; Green Lake: 
pickerel; Lake Michigan: pickerel. 
Ascaris scaphrhynchi Pearse 
Pound in the intestine of the hackleback, or sand sturgeon, in 
Lake Pepin. 
Camallanus ancylodirus Ward & Magath 
This species was found in the intestine of a lake carp (Carpoides 
thompsoni Agassiz) caught in Lake Pepin. 
Camallanus oxycephalus Ward & Magath 
This species was found in Lake Pepin only. It was usually 
hanging from the intestine out through the anus. The color in 
life was bright red. Occurred in the following fishes: mooneye, 
mud cat, yellow bass, short-headed redhorse, log perch, black crap- 
pie, white bass, wall-eyed pike. 
Capillaria catostomi Pearse 
This species was found in the intestine of a sucker caught in 
Lake Michigan. 
