28 



THE AMERICAN BISONS. 



Explanation of Table V. 



1. Bison latifrons. Specimen from 'Natchez. Mississippi. (Measurements from Leidy.) 



2. Bison antiqutis. Specimen from Pilarcitas Valley, California. (Measurements from Leidy.) 



3. Bison antujuus. Alameda County, California. (Nat. Mus., No. 8.270.) 



4. Bison antiquus. California. (Prof. Whitney's Collection.) 



5. Bison nntii/mix. Darien, Georgia. (Dr. Harlan's measurements.) 



6. Bison priscus. Specimens from Mannheim, Germany. (Measurements from Meyer.) 



7. Bison americanus. Specimens from Big-bone Lick. Kentucky. 



In the .Museum of Comparative Zoology are two jaw fragments from Cali- 

 fornia belonging to Prof. J. D. Whitney. One of these is 14 mm. iu length, 

 and contains portions of two of the premolars and of the true molars. Its 

 height at the last molar is but little greater than the corresponding measure- 

 ment in a very large old male B. americanus (see Plate III), but its thickness 

 at the same point is nearly one third greater. The other fragment is 

 IS mm. in length and embraces the portion of the jaw between the inner 

 angle and the first true molar. This belonged to a much smaller animal, 

 perhaps a female, but is still very much larger than the corresponding part 

 in the largest old males of B. americanus (see Table VI). 



TABLE VI. 

 Ml LSUREMKNT8 "t Till LOWEB Jaw. 



lcie.'tli from tip to angle 



Height at the angle 



" last molar 



" " first premolar 



Thick nest '' las) molar 



" " " second molar 



'• fir-t premolar 



( 'ircumference at last molar 



" first premolar 



■ if the alveolar space "I molar) 



" " " the true molar- . 





• 



First premolar added by estimate, 



Explanation of Tabic VI. 



l ' I amt ricanu*. 



lent from California (Whll I 14 mm. long, containing portions of twopremoli 



I 



