“ene ours 
REP ea eiR ea ors 
THE AMERICAN BISONS. 19 
The imperfect humerus from Georgia is rather larger (about one tenth) 
than the humerus from Eschscholtz Bay referred by Dr. Richardson to his 
Bison crassicorus, as shown by Dr. Leidy’s measurements. The tibia has 
also about the same proportional size as the humerus. 
The metatarsal bone from Georgia is also a little stouter than the meta- 
tarsal attributed by Dr. Richardson to Bison crassicorms, though of about the 
same length, but, as shown by the subjoined table of measurements, neither 
differs much in size from the corresponding part of a large old male aurochs, 
all of which much exceed in size the metatarsal of an old very large male 
Bison americanus. 
TABLE Il. 
MrasureMents or Meratarsau Bones. 
1 2|3 4,516 7\8 5 
ee length (2 ee 268) 264) 266) 256) 264} 243] 256 288 “970 
test transver se ee of . oximalend.......... 63) 65) 66) 57| 5¢| 44) 68\.... 2. 
Ge oe ero-posterior diameter of proximal end..... 61, 62] GO| 55) 50) 40) 63)....|.... 
Transverse ae ee sha. + Bhi in. from proximal end..| 39) 44| 46] 35; 37, 25] 43/....| 45 
Antero-posterior diam. of hale 3h i in. from pro vos end| 39) 44) 35) 40) 39) 28) 42.....|.... 
Circumference of shaft 34 in. from proximal end....... 142} 145} 130] 124) 133) 92) 147] 130 
Explanation of Table Il. 
Bison “crassicornis.” “No. 78” of Richardson. 
No 
. Bison latifrons. Dr. Leidy’s specimen, Darien, Georgia. 
Bison bonasus. Large old male. (M. C. Z. No. 165.) 
Bison americanus. Large old male. (M. C. Z. No. 10) 
a PP Oo 
Bison americanus. Specimen (fossil?) from Dubuque, Iowa. (See Wyman, in Whitney’s Rep. on the 
Upper Mississippi Lead Region, p. 421.) 
Bison americanus. Adult female. (M. C. Z. No. 1735.) 
Domestic Bull, “ Baron of Oxford.” 
. Bison priscus. Specimen from Clacton, England. Professor Owen’s measurements. 
oO OI a 
Bison “ bonasus.” “ Sub-fossil” specimen from Lilljeborg’s measurements. 
The fragment of a ramus from Georgia is the only portion of the lower 
jaw‘ supposed to belong to any of the extinct American bisons thus far 
described. The teeth in this fragment being very much worn and their 
original characters thereby disguised, the specimen was at first referred to 
the genus Sus, and was subsequently made the basis of a new genus for a 
Supposed new “ tapiroid pachyderm.” Still later it was determined by Dr. 
Leidy to belong to an extinct bison, being referred by him to Bison 
