2O Bulletin American Museum of Natural History. [Vol. XX, 



176 ; upper toothrow (on alveolar line), 73 ; ratio of interorbital breadth 

 to basal length, 41. Hoof of outer digit of fore foot (at edge of hair), 

 66 x 30; do. hind foot, 57 x 28. 



An adult female skull measures, occipito-nasal length, 291; basal 

 length, -- (skull imperfect); zygomatic breadth, 105; interorbital 

 breadth, 87; width of maxillary region above m a . 80; nasals, 85 x 32; 

 length of palate, 169; upper toothrow, 76.5 



The collector's external measurements, in part, are as follows: 

 Femur to humerus, 33 \ in. (851 mm.); height at shoulders, 39^ in. 

 (997 mm.). 



Oreamnos montanus columbianus, subsp. nov. 



Type, No. 19838, $ ad., Shesley Mountains, northern British Co- 

 lumbia; Andrew J. Stone. 



Old male skull (type), occipito-nasal length, 336; basal length of 

 Hensel, 293; zygomatic breadth, 119; interorbital breadth, 98; width 

 of maxillary region above m 2 , 87; nasals, 122 x 38: length of palate, 

 184; upper toothrow, 77; ratio of interorbital breadth to basal length, 

 35. Hoof of outer digit of fore foot, 74 x 35; do. hind 'foot, 66 x 33. 



The collector's external measurements are, in part, as follows: 

 Femur to humerus, 36 in. (914 mm.) ; height at shoulder, 43 in. (1088 

 mm.). 



Two other males, adult but not so old, are slightly smaller, having 

 an occipito-nasal length, respectively, of 332 and 299. Three skulls 

 from the Selkirk Mountains (near Golden), southern British Columbia, 

 collected and presented by Messrs. Madison Grant and C. A. Moore, 

 Jr., agree almost exactly in measurements and proportions with the 

 two largest skulls from the Shesley Mountains in northern British 

 Columbia. 



Oreamnos montanus missoulae, subsp. nov. 



Type, No. 19336, $ ad., Missoula, Montana; E. S. Hathaway. 



Old male skull (type), occipito-nasal length, 299; basal length of 

 Hensel, (basioccipital region mutilated); zygomatic breadth, 108; 

 interorbital breadth, 87; width of maxillary region above m 2 , 81; 

 nasals, 104x33; length of palate, ; upper toothrow, 69; ratio of 

 interorbital breadth to basal length, . Hoof of outer digit of fore 

 foot, 56 x 28; do. hind foot, 52 x 26. 



There are no collector's external measurements available. 



Another Montana specimen (skull), not quite so old, but a mature 

 adult, is slightly smaller. An old female skull measures, occipito- 

 nasal length, 280; basal length, (basioccipital region imperfect); 

 zygomatic breadth, ; interorbital breadth, 80; width of maxillary 



