Figure 4. — Silver and northern brook lampreys (ammocetes), Ichthyomyzon sp. 



2D. Ichthyomyzon sp., silver and northern brook lamprey ammocetes, (fig. 4) 



Records of collections of larvae of the genus Ichthyomyzon from 59 Lake Superior tributaries 

 are included as supplemental to those for adult Ichthyomyzon unicuspis and Ichthyomyzon 

 fossor . 



Records by state and county: 



Michigan - Chippewa 1, 3, 12, 14; Alger 35, 38; Marquette 40, 41, 44, 46, 49, 50, 51, 52, 53; 

 Baraga 55, 56, 57, 60, 61; Houghton 64, 65, 66, 67, 69, 70, 85, 90, 92; Keweenaw 71, 72, 77, 81; 

 Ontonagon 94, 95, 96, 97, 99, 101, 102, 103, 110, 111, 112; Gogebic 117. 



Wisconsin- Ashland 131; Bayfield 134, 137, 142, 143, 147, 149, 150, 151; Douglas 152, 153, 

 154, 155, 156. 



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