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28 



THE AMEEICA¥ BISOIsTS. 



Explanation of Table V 



1. Bison latifrojis. Specimen from Natchez, Mississippi. (Measurements from Leidy.) 



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



3. Bison antiquus. Alameda County, California. (ISTat Mus., No. 8,270.) - 



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



5. Bison antiquus. 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. 



: .1 

 J I 



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. in 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. americamis (see Plate III)^ but its thickness 

 at the same point is nearly one third greater. 

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



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. americamis (see Table VI). 



The other fragment is 



angle and the first true 



t 



TABLE VI 





Measurements of the Lower Jaw, 



Extreme length from tip to anc^le 



Heio-iit at the an2;Ie 

 ** ** last molar 



u 



(( 



y 



first premolar 



Thickness at last molar . 



" " " second molar 



" " first premolar 



Circumference at last molar 



'^ " first premolar . 



Length of the alveolar space of molars 



" the true molars 





ii 



a 



* First premolar added by estimate. 



Explanation of Table VI. 



1. Old male Bison americanus. 



400 



205 

 76 

 50 

 29 



780 



24 



185 

 135 

 152 



40 



800 



4 



27 



SQ 



56 



200 



41 



• 27 



90 

 60 



195 

 127 



*165 



2. Fragment from California (AVhitney's ColL), U mm. long, containing portions of two premolaVs and 

 portions of the three true molars. 



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