!IO THE FISHES OF OHIO. 



touched at Willoughby ; Chippewa Lake, near Medina ; Summit 

 Lake, at Akron, and Pippin Lake, near Kent, were investigated, 

 and 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 Notropis cornuhis 

 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, pi. 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, pi. 7, figs. 1-3). This Psorosperm has 

 been noted by the writer on N. comutus from Franklin County, 

 and from Licking Reservoir in the Ohio River drainage, and from 

 Huron River, Cuyahoga River, Grand River, and Chagrin River, 



