PEATE i1f. 
Rami of Bison antiquus and B. americanus. (All natural size.) 
Fig. 1. Fragment of a jaw of Bison antiquus, from California. (Specimen received from Professor J. D. 
Whitney.) : 
Fig. 2. Corresponding part of the jaw of Bison americanus. 
Fig. 3. Fragment of a jaw of Bison antiquus, from California. (Specimen received from Professor J. D. 
Whitney.) 
Fig. 4. Corresponding part of the jaw of Bison americanus. 
Fig. 6. Teeth from above of the jaw-fragment of Bison antiqwus, represented in Fig. 1. 
Fig. 7. Corresponding teeth of Bison americanus. 
Fig. 8. Teeth from above of the jaw-fragment of Bison antiquus, represented in Fig. 3. 
Fig. 9. Corresponding teeth of Bison amerscanus. 
Fig. 10. Section showing the thickness of the jaw-fragment of Bison antiquus, represented in Fig. 1. 
Fig. 11. Corresponding section from Bison americanus. 
