Figure 2. — Silver lamprey (adult), Ichthyomyzon unicuspis. 



1. Ichthyomyzon unicuspis Hubbs and Trautman, silver lamprey (adult) (fig. 2) 



Adult silver lampreys were collected from 35 streams. Ammocetes of the genus Ichthyomyzon 

 have been found in all of these streams except the Two Hearted River, Luce County, and Furnace 

 Creek, Alger County, Mich. 



Records by state and county: 



Michigan - Chippewa 1, 3, 14; Luce 19; Alger 33, 35; Marquette 40, 46, 49, 50, 51, 53; 

 Baraga 55, 57; Houghton 64, 65, 70, 92; Keweenaw 72, 81; Ontonagon 94, 96, 97, 99. 



Wisconsin - Ashland 131; Bayfield 134, 147, 149, 150, 151; Douglas 152, 153, 154, 155, 156. 



10 



