-10 THE FISHES OF OHIO. 
touched at Willoughby ; Chippewa Lake, near Medina ; Summit 
Lake, at, Akron, and Pippin Lake, near Kent, were investigated, 
aud some time was also spent at Buckeye Lake, better known as 
the Licking Reservoir; and the North Fork of Licking River, 
with some of its small tributary streams, was seined near Newark. 
The results of these investigations will be found embodied in the 
“occurrence notes of the following list. 
No attempt was made to collect the parasites of fishes, but in 
a few cases these were common enough to attract the attention of 
even the casual observer. In Ashtabula Creek a species of leech 
was found attacking the catfish. The largest of the leeches were 
about one and one-half inches in length. They were found 
usually attached to the lower jaw among the barbels, which in 
color they closely resembled. Not a catfish was taken in this 
stream but what bore the evidence of the work of this parasite, 
and frequently a half dozen leeches would be found on a single 
small catfish. In the headwaters of the Wabash River, in Mer- 
cer County, a species of crustaceous parasite was found in great 
numbers attacking especially the suckers and minnows. So 
numerous were they that it was difficult to find individuals of 
Catostomus commersonii and Campostoma anomalum, the species 
most affected, without at least one of these parasites. The points 
-of attack were chiefly the regions immediately behind the pectoral 
and ventral fins, probably because they were most protected in 
such position. A Myxosporid parasite attacking JVotropis cornutus 
was noted for a number of localities in central and northern Ohio. 
This species has been partially described by Linton (Psorosperm 
of Notropis megalops | cornutus|, Linton, Bull. U. S. Fish Com. 
for 1889 (1891), IX, pp. 459-61, pl. 120, figs. 1-3), from speci- 
mens taken by Mr. L. M. McCormick, in Black River, Lorain 
County, September 1, 1890, and again on October 5, 1891; and 
Gurley mentions it with additional notes (‘‘ The Myxosporidia 
or Psorosperms of Fishes,’’ by R. R. Gurley, Report of the 
Commissioner of Fish and Fisheries for 1892 (1894), 12. Genus 
et sp. incert., pp. 182-3, pl. 7, figs. 1-3). This Psorosperm has 
been noted by the writer on JV. cornutus from Franklin County, 
-and from Licking Reservoir in the Ohio River drainage, and from 
Huron River, Cuyahoga River, Grand River, and Chagrin River, 
