n)() Pr()(‘cc<hiir/s of the Bi.olor/iccd Sorieh/ of W'o.diinf/lon. 
Ursus kidderi tundrensis sul>s}). iiov. 
Ti/pe. Xo. 7(i470 c? adult, V. S. Nat. .Muh., I>i()lo<Tica! Survey (.'ull. 
troui Sluiktolik River, Nertou Sound, Alaska. Cuik'ctod l)y natives 
Sept(Mul)er, kSdd, and secured tlirou^h RudoH’ Neuman, late A<>:eut of the 
Alaska Coinuiercial Co. at Iliuliuk, IJualaska. 
CJutraciers. —Size small, ajrreeiii^ in this res|)(‘ct with kldclcri ; skull 
rather lonjr and heavy; frontals hrf)ad and Hat, broadly hut not dt'eply 
suU‘at(mnedially; postorhital proc(‘Sses small; coronoid hhuk' faUaite and 
ratluM- hi,irh. Similar to kidderi in essential cu-auial and dtudal characters, 
hut (lillerinjxin having the frontal shield and i)ostorhital proce.<.<es rer////( wr/? 
broader and flatter, and the frontal sulcus less marked. \\i kidderi, 
there is little ditlerence in the sex(!s except that th(' females have 
narrower muzzles, and narrower frontal shi(‘lds. A youne: male (No. 
7()4(id) from .\ndreafski on the lower Vidvou, collected hy K. \\'. Nelson, 
has somewhat shorter canines than the otlu'rs. 
From alaficensis, th(M irizzly of the same jreneral r(‘e:ion,,skulls of tiui- 
drensis (adult males in both cases) may he distinp:uish('d hy the followinj; 
characters: size larjrer ( basilar and occipito-nasal leuj^ths fully an inch 
<.M'(‘ater) ; skull as a whole much mon^ massive; frontals broader, rising 
l(‘ss ahrujitly from facial plane, less swollen over orbits ; rostrum l(‘.s< 
slender; palate more Hat; ramus of jaw thicker under 2d and (id molars; 
coronoid blade more falcate; canines larjrer, decidedly longer, and some¬ 
what h'ss curve«l ; molars decidedly lari^er 
