248 PROCEEDINGS OF THE ACADEMY OF [1895. 



of any marked depression of the intercorneal plate; from bombifrons 

 by its much greater size and by the flatness of horn core at superior 

 base, which, in bombifrons, is highly arched as in Bison bison. 

 The horn is also less abruptly depressed than in bombifrons, in this 

 character being intermediate between the lop horned type of Ovibos 

 and the erect type of bison, B. patifrons being in turn an inter- 

 mediate type between the Durham cave specimen and B. antiquus 

 which forms the last step toward the now existing B. bison, the 

 apical portion of whose horn cores is vertical when the skull is 

 poised at the normal facial angle of forty-five degrees. The striking 

 peculiarities of this fossil appear to me sufficient to warrant a new 

 specific name. I would propose Bison Appalachicolus sp. nov., 

 Type, No. 29, Col. Acad. Nat. Sciences, Phila., Durham Cave, 

 near Riegelsvslle, Bucks Co., Pa. Postpliocene. 



Regarding the question of the existence of B. bison in the valleys 

 of eastern Pennsylvania since the advent of the white man in 

 America, it is probable that it had been effectually driven from the 

 Delaware Valley long before that date. 



Indeed, from the scarcity of its remains and the absence of reliable 

 tradition of its presence in this locality, it is unlikely that this species 

 was ever more than a straggler in the regions east of the Susque- 

 hanna River drainage. It is not unlikely that the Carlisle cave 

 specimens will be found to belong to the same species, as originally 

 identified by Prof. Baird. 



