Pearse—The Parasites of Lake Fishes. 
175 
Marsipometra hastata Linton 
In the intestine of the spoonbill in Lake Pepin. 
Ophiotaenia lonnbergii (Fuhrmann) 
In the intestine of the mud puppy in Lake Michigan. 
Proteocephalus sp. 
Unidentified proteocephalids were found in the intestines of 
fishes in Lake Geneva as follows: bluegill and smallmouth black 
bass; Lake Pepin: yellow bullhead, smallmouth black bass, two 
species of shiners, yellow perch, log perch, white bass, sauger, and 
wall-eyed pike; Green Lake: pickerel, bluegill, smallmouth black 
bass, yellow perch, and blunt-nosed minnow; Lake Michigan: rock 
bass, sucker, three species of ciscoes, lota, perch, and cottid. 
Proteocephalid cysts were found in the liver and peritoneum as 
follows: Lake Mendota: yellow perch and white bass; Lake Pepin: 
black and speckled bullheads, eel, sheepshead, channel cat, small¬ 
mouth black bass, short-nosed red-horse, black and white crappies, 
white bass, and wall-eyed pike; Green Lake: rock bass, bluegill, 
cisco, small and largemouth black bass, and yellow perch. 
Proteocephalus amhloplitis (Leidy) 
Intestinal representatives occurred as follows: Lake Geneva: 
both species of black bass; Lake Mendota: speckled bullhead, 
sucker, pickerel, long-nosed gar, and largemouth black bass; Lake 
Pepin: long-nosed gar and white bass; Green Lake: rock bass, 
pickerel, smallmouth black bass. 
Visceral cysts were common in the liver and peritoneum. Their 
occurrence was as follows: Lake Geneva: rock bass, both black 
bass, and yellow perch; Lake Mendota: rock bass, yellow and 
black bullheads, sucker, pickerel, top minnow, long-nosed gar, 
both black bass, white bass, and wall-eyed pike; Lake Pepin: black, 
yellow and speckled bullheads, sheepshead, sucker, channel cat, 
bluegill, mud cat, both black bass, a shiner (Notropis atherinoides 
Rafinesque), yellow perch, black and white crappies, white bass, 
sauger, and wall-eyed pike; Green Lake: speckled bullhead and 
smallmouth black bass; Lake Michigan: smallmouth black bass and 
yellow perch. 
