Proceedings of the Ploioglcal Sod.eti/of WfisJiingion. 
than out; palate broad I’or so small a skull; postpalatal shell' broad; 
coroiioid blade bii^b. Teeth small: m' very small; mshort, with 
broadly rounded heel (tooth lU'arly as broad j)ost(‘riorly as in middle and 
autei'iorly ). 
Shull of old frmaU' li'oiii Xavaho Raii^i', near (’romo, t’olorado (('(do¬ 
rado -Museum): Skull short, dished, witl’i broadly spreading' slijilitly 
bowed zy< 5 omata; truueati' occiput, liattish shicdd, and slender wididy 
outstanding ])Ostorbitais. Rostrum small, tapering, rising posteriorly 
into Hat lyrate shield; postorbital processes long, slender, and directed 
lorward as well as outward ; braincase rather l)road and dc'pressed; palate 
concave; postpalatal shell broad and Hat. Teeth modei‘at(‘: malors about 
saiiK' size as in male. 
Old uoile narnho compared icitli old male, /mrr/.'rvt.s* (bot h ty]M“s): Size 
sommvhat less; I'ostrum and palate sh older; })ostorbital processes smalku’ 
and outstanding instead ol decui'ved ; zygomatamore bowial and appar¬ 
ently more siuH'ading; i-amus shoider. H'eeth smaller. 
Old male iiaeaho compared imth old ‘male horn tear and <dd male /c.rca.s/.s 
(all tyiies): Size somewhat less; rosti'um and jialate shorter; ramus ol' 
jaw shorter; molar teeth smaller; heel of last upper molar more broadly 
rounded iiosteriorly. The jiostorhital processes and zygomata are like 
those (^1 texeiiaiH — the postorhitals small and outstanding, instead of de- 
curved as in horrimiis ; tht' zygomata oiitbowed, instead of angular as in 
horriieue. 
Old female aarnho from Xavaho Mir. com})ared leilh. <dd female hoerdear 
from moaalaius north, of Silver Clh/, Xeie Mexieo : Skull as a w hole and 
rostrum shorter; occiput doubtless more truncate (lliat of old female 
hormen.r sawed oH ); Irontal shield shorter and more dished; postorliitals 
longer, more slender and diri'cted autei'iorly as well as outward: zygo¬ 
mata much more broadly spreading, more swollen at anterior base, and 
distinctly bowed, insti'ad of angular; palah' broadc'r, Hal instead of con¬ 
cave*; lower jaw thicker and lu'avier. 
Ursus buirdi sp. nov. 
'I'yjte from Rdiie River, Summit ('o., (olorado. c? old, X'o. HO.'lSOd R. S. 
X'at. -Mus. Biological Sur\ey ('oil. (= HI47 Warri'ii (Collection). 
Characlerr. — Size large—in the K’oeky Mt. region exceeded only by 
horrihilir; skull long, with narrow elevate'd fronto-nasal region; claws of 
moderate length, smooth. 
Color.—(MixU' young-adult from B(*arlodge, Sundance X’ational Forest, 
('ook (Co., eastern Wyoming. Killed February, IS,S7,by Raul Kleineidam): 
-Muzzle pale brown (apparently old pelage); head and face blackish, 
becoming slightly grizzled posteriorly and on lower part of cheeks by 
wash of yellowish-brown tipped hairs; entire body, legs and feet very 
dark brown overlaid on back by wash of light tips. (Claws of moderate 
length, strongly curved, smoothly polished, dark horn color marked 
toward tips with jiak* yellowish, and most of them with whitish (super- 
licially) on upper side of basal half. 
