502 PROCEEDINGS OF THE ACADEMY OF [1897. 



Fig. 4. Bison latifrons (Harlan), type. Col. of Acad. Nat. Sci., 



Phila. From Big Bone Lick, Kentucky. 

 Fig. 5. Bison crampianus (Cope), type. Col. of Acad. Nat. Sci., 



Phila., No. 3 ; from Wellington, Kansas. 

 Fig. 6. Bison alaskensis sp. nov., type. Rear view of specimen, No. 



13,754 figured under No. 3, of same plate. 

 Note. — Figures 1 to 5 inclusive were photographed on same 

 plate and as nearly at same facial angle as possible, to show their 

 comparative size and the curvature of horn-cores. Figure 6 was 

 photographed separately and on a larger scale, as will be noted on 

 comparison with figure 3 of the same specimen. 



