OVIBOS. BISON. 57 



Measurements. Skull: total length, 430 mm.; occipito-nasal 

 length, 355; greatest breadth across orbits, 245; length of nasals, 

 median, 121; greatest width posteriorly, 64; anterior width (at tips), 

 13; zygomatic width, 168; palatal arch to end of premaxillae, 249; 

 greatest width of palatal floor between fourth premolars, 76; length 

 of horn core from edge on top of head to tip, 230; length of upper 

 tooth row, alveolar border outer side, 140; posterior width of basi- 

 occipital, 62 ; anterior width in front of bullae, 32 ; length of mandible, 

 345; length of lower tooth row, alveolar border outer side, 145. 



Genus 47. Bis<ni. liisoii, Aiiii'rican iiiillalo. 



Bison H. Smith, Griff. Anim. Kingd., v, 1S27, p. 373. Type Bos 

 bison Linnaeus. 



117. Bison bison (Linnaeus). 



Bos bison Linn., Syst. Nat., i, 1758, p. 72. 



Bison americanns Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 II, 1901, p. 49, pi. XXIII. Zool. Ser. 



Bison bison Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 1901, 

 Suppl., p. 486. Zool. Ser. 

 Bison. A.merican Buffalo. 



Type locality. Texas. 



Geogr. Distr. Practically extinct in the wild state; a few survive 

 in the National Park, and some are said to be in the Pan Handle 

 of Texas. 



a. Bifion Jtixon <if]i(ihasc(r Rhoads. 



Bison biso)i atJiabasccv Rhoads, Proc. Acad. Nat. Scien. Phil., 

 1897, p. 498. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 II, 1901, Suppl., p. 486. Zool. Ser. 

 Bison americamis athabasccB Elliot, Syn. X. Am. Mamm., F. C. M. 

 Pub., II, 1901, p. 49. Zool. Ser. 

 Wood Bison. 



Type locality. Fifty miles southwest of Fort Resolution, Great 

 Slave Lake, Mackenzie, Canada. 



Geogr. Distr. "Wooded uplands of Northwest Territories. For- 

 merlv from the east slope of the Ro^ky Mountains to the 95th merid- 

 ian, and from latitude 63° to latitude 55°; probably south along 

 the Rockv Mountains to the United States." 



