FOOD AND PARASITES OF SOME FRESH-WATER FISHES. HED 
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Stomach. Intestine. Rectum. cavity. 
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Leech in mouth, 1; cestode or nematode cysts in the liver, 6; cysts in mesentery, 1. 
9. Hupomotis gibbosus, common sun-fish. 
Six specimens only were examined. Of these 5 contained food, 
consisting of insect larvee, snails, and small bivalves. One sun-fish 
had no parasites; the other 5 contained each a number of Acanthoce- 
phala, encysted in the mesentery of 3 fish and mature in the intestine 
of the other 2. 
10. Micropterus dolomieu, small-mouthed black bass. 
But 5 specimens were examined, all caught during July in Lake 
Mendeta. One bass was free from food; in the stomachs of the other 
4, crawfish were found. Cestodes were more abundant than any other 
parasite, and were found in the stomach, body cavity, and ovary. 
One species was Proteocephalus ambloplites. Azygia tereticolle was 
found once in the mouth and once in the stomach. Nematodes and 
Acanthocephala were found in the intestine of 3 of the bass examined. 
Encysted worms were found in the wall of the stomach of one fish and 
in the liver of another. 
11. Micropterus salmoides, large-mouthed black bass. 
Nearly all of the fish examined were taken from Lake Mendota. 
Only four were caught in Lake Monona and the same number in Lake 
Wingra. Most of the specimens from Lake Mendota were caught in 
the trammel net, and were taken on the southern shore near the mouth 
of or just within a small creek, which, in this part, was from 8 to 5 feet 
indepth. The majority of the fish were caught in April or May, a few 
only during July and August. To those already enumerated were 
added 4 bass from Round Lake in the northern part of tbe state. A 
careful study of the records failed to reveal any differences in food or 
parasites in the fish from the different lakes, except that the 4 from 
Round Lake all had copepods on the gills, there being among all the 
other fish but a single specimen so infected. 
Of the 42 fish examined, 29 contained food which could be recog- 
nized. The other 13 showed nothing the nature of which could be 
distinguished. The following table gives the kinds of food found and 
the number of fish in which each kind was present: 
Fish in Fish in 
Food. which Food. which 
found. found, 
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