1903.] 



Allen, Mammals from Northeast Siberia. 



175 



or less yellow, varying in different specimens from a faint 

 tinge to deep yellow. 



I add herewith the external measurements of 2 1 specimens 

 taken by Mr. Buxton from the fresh specimen, and include 

 therewith the three principal skull measurements, so far as 

 the skulls are available for this purpose, a few of them being 

 too imperfect for measurement. 



MEASUREMENTS OP Putorius ermineus. 



Material from northern Europe available for compari- 

 son with the Siberian series is too scanty four specimens 

 only to be of any importance, but so far as it goes the 

 specimens from northern Europe do not differ appreciably 

 from those from northeastern Siberia. 



Externally the Siberian animal does not differ noticably 

 from P. richardsonii from eastern Arctic America, of which I 

 have some 30 skulls and nearly 40 skins, collected in the vicin- 

 ity of Repulse Bay (a northwestern arm of Hudson Bay). 



