M'CHESNEY on DAKOTA MAMMALS. 



209 



Measurements of specimens (with the above proviso) are as follows : — 



[But unless each specimen has been examined by the molars, the list undoubtedly 

 includes specimens of A, riparius. — E. C] 



111 

 117 

 118 

 120 

 123 

 168 

 190 

 1S)4 

 195 

 199 

 205 



Place of collecting. 



Fort Sisseton, Dak. 



---.do 



....do 



...do 



....do 



....do 



....do 



....do 



....do 



....do 



....do 



Date of col- 



lectine. 



Mar. 26, 1877 

 Apr. 6, 1877 



do 



Apr. 11,1877 

 May 13, 1877 

 May 16,1877 

 Jano 19, 1877 

 Juno 29,1877 

 July 18, 1877 

 Aug. 14, 1877 

 Sept. 7,1877 



From tip of nose to — 



0.43 



0.48 

 0.55 

 0.43 

 0.47 

 0.51 

 0.49 

 0.42 

 0.45 

 0.46 

 0.44 



0.89 

 0.86 

 1.01 

 0.91 

 0.95 

 0.!i9 

 1.03 

 l.Ol 

 1.00 

 0.92 

 0.92 



1.15 

 1.14 

 1.18 

 1.23 

 1.25 

 1.25 

 1.40 

 1.27 

 I. 32 

 1.22 

 1.12 



Measurements of one hundred sjiecimens of Akvicola. riparius and A. austerus taken 

 at Fort Sisseton, Dak., October 2(>, 1877, and carefully vieasured in the flesh hy Charles E. 

 McChesney, Acting Assistant Surgeon, United States Army. 



Bull. iv. No. 1—14 



