354 



HENRY LESLIE OSBORN. 



Date. 



Observer. 



Name Used. 



Host. 



iSeat of Infection.' Locality. 



2. MODE OF OCCURRENCE IN THE BLACK BASS 

 AND PERCH, AT NEBISH, MICH. 



The observations now to be described were made at Nebish 

 in 1901 and repeated the following year. Nebish is a small 

 settlement on the American side of the St. Mary's River about 

 midway between Lake Superior and Lake Huron. At that time 

 bass and perch were fairly numerous, beginning in the early 

 part of September and the last of August. As they were not 

 caught much earlier it was the local opinion that the fish 

 migrate to the grounds at Nebish from elsewhere, and this is 

 borne out by the fact that of late years, as a consequence of the 

 work done in improving the channel of the river for navigation, 

 the bass have ceased to come in the fall and the "fishing" is 

 destroyed. I examined as many of the various kinds of fish and 

 invertebrates as possible during my short stay at Nebish in hope 



