16 THE AMERICAN BISONS. 
latifrons. Its size, however, as given by Dr. Harlan,* shows it to have been 
of about the size of or at least not larger than corresponding parts of Duson 
antiquus from California. 
As already remarked, the horn-cores of Bison datifrons have fully twice the 
dimensions of the largest horn-cores of Bison priscus of Europe, this dis- 
crepancy at once indicating the two species to be animals possessing very 
diverse characters. In the subjoined table is given in a single comparative 
view the measurements of the skulls and cranial fragments.of all the forms 
of fossil bisons thus far described, which in the present paper are referred to 
three species, namely, Bison antiquus, Bison priscus, and Bison latifrons. The 
first-named is the smallest, with relatively small, short, much curved, and 
abruptly conoidal horns; the second is but little larger, apparently, in 
general size, but has somewhat longer, less curved, slenderer, and ‘more 
gradually tapering horns; the third is apparently considerably larger even 
than the second, with immensely greater horn-cores, which when covered 
by the horns must have had a spread at the tip of between ten and twelve 
feet. 
TABLE III. 
MEASUREMENTS OF SKULLS OF ExTINcT Brsons. 
Bison . . Bison 
antiquus. Bison priscus. latifrons. 
11\2,814'5'61,7'18/9 oe 12/13 /14|15 |16|17|18/19 
ae ores of premaxillee to occipi- 
tal col s.c| .. | 646] 649] 651 ..-| | |e) we) esi) | | O80) ae 
ee 6 00 Occipital crest... |) <-. (S48) 9.0). (9828) see) eel veel 8) cel eel one] eee ee S08 288). eles] cee 
Width 2. ae a at narrowest part . 
(between orbits and horn-cores).. oleae et el ee OO ee 
ne oe ween edges of the one ...| 420] ...| 365/ 360] 369] ...| 374] 379] 341| 340| ...| 351] 368| 380) ...| ...) ---] ... 
Distance between bases of horn-cores..}| ...| 332] 380] 383] 355] 303] 360) 437] 404| 307 309| 356| 366| 379, 350) ...| 413) ...| 407 
Width of occipu ;--| 882) ...| ...| 297| 292] 269) 291! 310 J70\.. «| 281 i pec were cel eae 
Leng f horn-cores, upper side...... ...| 338] ...| ...| 514] 564) 759] 546] 487] 592| 496/2738) 532) 465 ASON ene oss ioe | 2013 
Circumference of horn-cores at ba 370| 360] 380] 391] 380] 415] 417| 364| 382) 377] 375] 418) 373] 389 350) ...| 520) 497) 510 
Distance between extreme tips of ie n- | 
cores . ...| 900] 936] ...|1058) 996, 1382/1236'1032) 1034} 992/1066) 1068 QsiU WUE SE a clcecll anal) Gor 
Length of nasals ...-........-seeseeeee eel pool eal) OPIN OPP) coal Gaclk oscil ec dlesscc |) Geol Gul Soul gua ices 
Length of Le series of maxilla ...... Bec cool ree ons 188, oie 
Explanation of Table III. 
1. Bison antiquus Leidy. Big-bone Lick specimen. 
2: Bison antiquus. Specimen from California described by Dr. Leidy. 
3. Bison antiquus. California. Measurements communicated by Dr. J. G. Cooper. 
4. Bison priscus Meyer. Specimen from Bjersjohlm, Scania. Measurements from Nilsson, as quoted 
by Dr. Richardson. 
* Amer, Journ. Sci. Vol. XLII, p. 148, 1842. 
