PLATE Vit. 
Figures of three skulls of Bison americanus, females, showing the great diversity of form that obtains in 
adult specimens of the same sex. Also figures of a skull of Bison bonasus, female, and of metatarsal 
bones of Bison americanus and B. latifrons ? (Skulls, one fourth natural size ; metatarsal bones, 
one third natural size.) 
Fig. 1. Occipital view of a skull of a female B. americanus, about six years old, from Kangas (specimen 
No. 105) 
Fig. 2. Occipital view of a skull of a female B. americanus, about six years old, from Kansas (spec. 
No. 12). 
Fig. 3. Occipital view of a skull of a female B. americanus, about six years old, from Big-Bone Lick, 
Kentucky (spec. No. 2059). : 
Fig. 4. View in profile of a skull of B. wmericamus, female, about six years old, from Kansas (spec. 
No. 105). 
Fig. 5. View in profile of a skull of B. americanus, female, about six years old, from Kansas (spec. 
No. 12). 
Fig. 6. View in profile of a skull of B. americanus, female, about six years old, from Big-Bone Lick, 
Kentucky (spec. No, 2049). 
Occipital view of a skull of B. bonasus, female, about six years old (spec. No. 1790). 
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Fig. 
Fig. 8. View in profile of the same. : 
Fig. 9. Metatarsal bone of B. americanus, female (spec. No. 12). 
Fig. 10. Metatarsal bone of B. americanus, male (spec. No. 10). 
Fig. 11. Metatarsal bone of B. latifrons? from Darien, Ga. (The original specimen described by Dr. 
Leidy, now in the Museum of the Boston Society of Natural History.) 
