1897.] NATURAL SCIENCES OF PHILADELPHIA. 501 



6. Bison antiquus Leidy. Proe. Acad. Nat. Sci. Phila., 1852, p. 117, (= B. craasi- 

 cornis Richardson, Zool. Voy. Herald, 1S54 [restricted type], pp. 40 & 41, PL IX). 



Pleistocene of eastern Kentucky. North America, from north- 

 western Alaska to southeastern Georgia and Texas. 



7. Bison sp. T 1 3 (="B. latifrons" Leidy, Rep. U. S. Geo]. Surv. Terr., I, p. 



253, PL XXVIII, figs. 4 & 5). 



Pleistocene of western California. Pacific slope, from Oregon 

 southward. 



8. Bison bison athabascae subspec. nova (1. c), (=B. bison Auct. in part.=" Wood 

 or Mountain Buffalo "). 



Recent of northern Athabasca, N. W. T. Wooded uplands of the 

 Northwest Territories, from the east slope of the Rocky Mountains 

 to the 95th meridian, and from Iat. 63° to lat. 55° ; probably reach- 

 ing southward along the Rocky Mountains to the United States. 



9. Bison bison (Linnams). Syst. Nat., 1758, p. 72 ; (= B. americanus Guielin, Syst. 

 Nat. Linn. I, 1788, p. 204). 



Recent of Interior North America. Lowlands east of the Rocky 

 Mountains and west of the Allegheny Mountains, the Great Lakes 

 and Lake Winnipeg ; and from the Saskatchewan River south to the 

 Gulf of Mexico, near lat. 25°. 



EXPLANATION OF PLATE XII. 



Fig. 1. Bison bison (L.). Old male ; Col. of Acad. Nat. Sci., Phila., 

 No. 4,589; from the plains of the western United States. 



Fig. 2. Bison californicus sp. nov. type. Old male ; Col. Acad. Nat. 

 Sci., Phila., No. 297 ; from Pilarcitos Valley, near San 

 Francisco, California. Labelled " Bison antiquus Leidy." 

 The original of Leidy's figures of " Bison latifrons " (sic), II. 

 S. Geol. Surv. Terr.,' Vol. I, 1873, p. 253, PI. XVIII, figs. 

 4&5. 



Fig. 3. Bison alashensis sp. nov. type. Old male; Col. of Mus. Sci. 

 and Art, Univ. of Penna., No. 13,754 ; from Tundra, near 

 Point Barrow, Alaska. 



13 During the foregoing investigations the writer was in frequent cor- 

 respondence with Mr. F. A. Lucas, of the Smithsonian Institution, who is 

 preparing an illustrated monograph of American fossil bisons, and has kindly 

 given valued suggestions on controverted points. Having called his attention 

 to the radical differences between the type of Leidy's B. antiquus and his 

 California specimen of so-called '' latifrons," Mr. Lucas now concurs in the 

 opinion that they are distinct species, and that the California species should 

 be given a name. It is therefore proposed that the name Bison californicus 

 be applied to it, the type of the species being No. 297, Col. Acad. Nat. Sci., 

 Phila. For characters, etc., see Leidy references ; also PI. XII, fig. 2. 

 33 



