26 THE AMERICAN BISONS. 
described species of Bison, it apparently differs but little in size from the true 
Bison priscus of the Old World. 
TABLE IV. 
MEASUREMENTS OF HoRN-CORES AND SKULLS OF EXISTING AND EXTINCT Forms or Bison. 
1/2}3/4/5)6]7/s/9 20]12]22/28 |14/ 15 16 
Distance from mesial plane of oo | 
ut to tip of Ae horn-core. . ©. .|860/325/300/1827)3201., 10.,1890).. 470)... |... ee 
Distance eee nos a n-cores 760). JGSO0Go0D6SGLOIOL7)...1...1...|.. |920 1008 .. 1... .|1932 
ist. between cele. sO20ln.. (392) 300 450 a. 
Least width of pore etn den 
orbits and horn-cores) ...-..--|... be O1280 2600/2771 2101278)... 1. . 1... 1386)....1380|.7..).... 
Greatest v vidth of occiput .....-.: 276/28 24> 24512 (3 1203|. |... 1. 832 a Saale. 
L’eth of horn-core along upper side .. 270 260)210/170/196/190)...|.. ./245/.. ./336) 514)...].... 813 
Circumference of horn-core at ee : ae a0. 520) 2445/*510 
Cire. of horn-cores 14 in. from base “4 0| 0| 0} 0 O20) 0) 2 ) ¢ | Oo} ? j307| 307) 368 
* Estimated. 
Explanation of Table IV. 
1. “ Bison priscus 2?” Rich. Specimen No. 24,589, Zool. Voy. of Herald, p. 35. (Measurements from 
Richardson.) 
2. “ Bison priscus?” Rich. Specimen No, 105, Ibid., p. 35. (Measurements from Richardson.) 
Bison antiquus. ee from St. Michael's, Alaska. 
Bison americanus. Big-bone Lick, Kentucky. (M.C. Z., No. 2050.) This specimen has the 
Lal 
largest horn-cores I have met with in any specimen of Bison americanus. 
Bison americanus. Big-bone Lick, Kentucky. (M. C. Z, No. 2047.) 
Bison americanus, adult male. Specimen No. 91, Mus. Comp. Zodlogy. 
Bison bonasus, adult male. Specimen No. 195, Mus. Comp. Zoology. 
Onan 
. “Bison crassicornis,” Rich. Capt. Beechey’s specimen, Zool. Voy. of Herald, p. 41. (Measure- 
ments from Richardson.) 
9. “ Bison crassicornis,” Rich. Specimen No. 91,— the large horn-core figured and described by Rich- 
ardson, l. c. p. 42. Said to have been somewhat reduced in size by abrasion. - (Measurements from 
Richardson.) 
10. Bison antiquus. ce collected by Mr. W. H. Dall on the Tatlo River, a (No. 7529 of 
the National Museum). 
11. Bison antiquus Leidy. Original specimen from Big-bone Lick. 
12. Bison antiquus. Specimen from California, described by Dr. Leidy. 
13. Bison priscus Meyer. Specimen No. 7 of Meyer’s Memoir, 1. ¢. 
14. Bison latifrons Leidy. Peale’s original specimen. 
15. Bison latifrons. Carpenter’s specimen from Texas. 
16. Bison latifrons. Adams Co., Ohio. 
From the above measurements it appears that the horn-cores of Bison 
“ priscus ?” (— B. antiquus, female) are very much larger than those of even 
the males of either Bison americanus or Bison bonasus, but the specimens do 
not appear to be in other respects larger; the horn-cores of “ B. erassicornis” 
