2 University of Michigan 



In addition to our own records, we have secured many val- 

 uable notes on the distribution of the larger species from J. 

 E. Fischer, of Alerriweather, Ontonagon County, a trapper 

 of many years' experience ; "and from Benjamin J. Twombley, 

 of Bent's Resort, Wisconsin, who has made many observations 

 on the mammals of the Cisco Lake Region. We have also 

 added a number of records from J. E. Marshall, who trapped 

 for many years, beginning 1884, in Ontonagon and Gogebic 

 counties, and from Ole Petersen, at one time a trapper at 

 Gogebic Lake. 



The habitats in which records of occurrence have been 

 obtained for the region under consideration are listed under 

 each species ; and the number of individuals taken, or seen and 

 positively identified, in each habitat are given. From the 

 figures a rough estimate of the relative abundance of the 

 various species in the different habitats can be obtained, but 

 the various habitats were not trapped or studied equally inten- 

 sively, and for the larger and the rarer forms the numbers 

 give little dependable data on relative abundance. 



Descriptions of the Regions Studied 

 Cisco Lake Region. In the Cisco Lake Region there are 

 many lakes, mostly small, but several of a length of one to 

 three miles. The water-level in the Cisco Lake chain has been 

 raised six or ten feet by a dam across the outlet, and this 

 change in water-level has killed the trees along the lake bor- 

 ders, so that the lakes are fringed by a narrow line of dead 

 trees. The habitats of emerging vegetation and of aquatic 

 vegetation have been much altered by the change in water- 

 level, and these habitats cannot be well studied in these lakes. 

 However, the neighboring lakes in which the water-level has 

 not been changed show that the forests of the region originally 

 came down to the water's edge, and that there was little nor- 

 mal development of marsh or swamp. 



