NOTES ON WISCONSIN MAMMALS. 
By N. Hollistkr. 
The following fragmentary notes on Wisconsin mammals are 
intended as supplementary to the excellent and conservative list 
recently published by Hartley H. T. Jackson/ 
One of the important objects of such a paper as Jackson's 
preliminary list is to induce others to publish any additional 
information they may have, that it may become available to the 
local workers. In determining the geographic and zonal distri- 
bution of mammals it is important to have records from as many 
localities as possible, even for the most common and generally 
distributed species. Many previously unthought-of factors regu- 
lating the distribution of a form within the state may be disclosed 
by a carefully prepared map of the range of the species, based 
upon authentic records. 
Thanks are due Dr. C. Hart Merriam, Chief of the Biological 
Survey, for permission to publish this paper and to include 
records of specimens in the Survey collection. 
Didelphis virginiana Kerr. 
Opossum. 
At least three oppossums have been killed in Walworth County 
during the past fifteen years, two of which I saw in the flesh. 
A fine male, killed at Delavan, October 19, 1902, is in the collec- 
tion of the Biological Survey. 
Cervus canadensis Erxleben. 
Canadian Wapiti. 
Elk formerly ranged throughout southern as well as northern 
Wisconsin. Sections of antlers are still occasionally found in 
AValworth County, most frequently under marshy ground. A 
fine pair was taken from Delavan Lake some years ago. 
Theodore Roosevelt says the elk disappeared from the region 
south of the Great Lakes and between the AUeghanies and the 
Mississippi River about the beginning of the nineteenth century 
1) Bull. Wis. Nat. Hist. Soc. VI, 1-2, pp. 13-34. Apr., 1908. 
i:?7 
