Merriain—Descriptions of N^eir Beors from North America. 181 
tions. In imperator posterior tVontiil n'^ion less elevated ; postcjrbital 
l)rocesses shorter; scpuunosal base of zy>^oina iniieli more* expanded ver¬ 
tically — ditierenc(‘s that seem trivial hy co'niparison with thi>s(; that 
characterize the male skulls. 
Old female imperator compared with adult femate abnarukioi (from head 
Hiu- Porcupine Creek, Montana, No. Idl’-I.') I’. S. Nat. Miis. ): Size essen¬ 
tially same; nasals more horizontal; fronto-nasal region much more* 
dished; frontal shield much broader; postorhital ])rocesses innch more 
massive; squamosal root of zygoma broadly ex])anded [in absarokus not 
expanded] ; palate much broader; ni)per molars broadei'. 
Ursus absarokus* sp. nov. 
^'ype No. cJ' ad., Ih S. Nat. Mns., Biological Survey Coll. From 
head of Little Itighorn River, northern part of Bighorn Mts., IMontana. 
Purchased for the Biological Survey in jNlay, by J. Alden J^oring. 
Characters. —Size large, l)ut much less than horribilis and with much 
smaller molars — especially m'h Kxternal charaiders unknown. 
Sk'ull of male (type specimen). — Vault of cranium rather highly arched ; 
zygomata moderately outspreading and somewhat bowed; frontal shield 
of moderate breadth, rising strongly from ascending rostrum, convex at 
and behind ])lane of postorbital processes, swollen on each side of median 
line just behind plane of orl)its; })ostorhital processes large, outstanding, 
and slightly ilecurved, the tips bluntly rounded; sagittal crest nearl}' 
straight, highest posteriorly, reaching anteriorly to fronto-parietal sutui’e; 
))ost[)alatal shelf broad and Hat; nasals large; nai'es normal oi’ ratlaM’ 
small for size of skull; rostrum high, of moderate length and breadth, 
rising stnjiigly into frontal shield; top of coroiioid broadly rouialed, its 
apex short, not reaching posteriorly to plane of condyle. Teeth rather 
large, especially m- which is long and broad, the heel emarginate on 
outer side. 
Skull of female (No. Pllido U. S. Nat. i\Ius. From head of Big Porcu¬ 
pine Creek [not Porcupine River] hcTween INrnsselshell and Yellowstone 
Rivers, eastern .Montana). — ()f g(mei-alized drizzly typ(‘ ; large and rather 
massive; vault of crainum rather Hat; hi’aincase rather broad; frontal 
shield of moderah* breadth, slightly conv(‘x, slightly di-pressed or sulcale 
between orbits, elongate-lyrate i)ost('riorly ; |)ostorbital pi'oeesses weak 
and sligidly (k'curved; sagittal c.rest not yet rc'aching fronto-parietal 
suture; muzzle moderate or ratlun- short; zygomata mod('i-ately spread¬ 
ing and rather angular ; ])alate I’atlu'r narrow. T('eth largi'; m - lai-ge 
and snhrectangular. 
Ursus tahitanicus sp. nov. 
Type No. 1701)28 c? old, U. S. Nat. IMus., BicHogical Survey (^>11. From 
Klappan Creek (=:!d So. Fk. Stikiiu* River), British Columbia, t'ol- 
K'cted and presented by (L Frederick Norton. 
Characters. — Size medium (skull of male sligbtly smaller than male 
stikeeneusis and canadensis; skull of female about same size as female 
stikeenensis, decidedly larger than female canadeusi.'i). CkHor of type 
* Xained for the .tbsiirokii or Crow tribe of Iniliaiis, in wiioie U'l ritory they occur. 
