82 BANGS — A BRITISH COLUMBIA WEASEL eee 
Skull: basal length, 43.; occipitonasal length, 44.; zygomatic width, 27.2; 
mastoid width, 25.2; width across postorbital processes, 13.2; interorbital 
width, 10.6; foramen magnum to plane of last molars, 26.; length of palate, 
to palatal notch, 19.8, to end of pterygoid, 25.4; length of single half of 
mandible, 27. mm. 
Remarks.— This new weasel is the northern Rocky Mountain 
form of the /ongicauda-arizonensis group. I give it as a subspecies 
of P. longicauda because it seems probable that intergradation 
takes place between most, if not all, of the members of this group. 
The one specimen I have is an unquestionable female, and is 
very different from females of the related forms — P. arizonensis, 
P. longicauda longicauda, P. longicauda spadix, P. allent, or P. 
saturatus. 
