III. EXTINCT SPECIES OF AMEKICAN OX. H 



J. Hamilton Couper, Esq., of Darien, Georgia, presented to the Academy of 

 Natural Sciences an os hifmeri and a tibia found in excavating the Brunswick 

 Canal, in Georgia. The specimens are well preserved in their texture, are hard and 

 lustrous, and brown in color. The former has its upper extremity broken off, and 

 the head of the tibia is somewhat mutilated. They belonged to a species of ox 

 considerably larger than the Buffalo, and probably belong to the Bison latifrons. 



The os humeri is of the right side, and measures nine and a half inches in circum- 

 ference at the middle of its shaft, and four and a half inches in breadth at the 

 condyles. 



The tibia, also of the right side, anteriorly, from the summit of the spinous 

 process of its proximal articulation, is eighteen inches in length, and the distal 

 articulation is three and a half inches in breadth. 



Mr. Couper also presented to the Natural History Society of Boston, an atlas 

 and a metatarsus of an extinct ox found in the same locality as the preceding 

 specimens. They have been kindly loaned to me by the Society, for examination. 

 They are perfect, are dense and heavy, and black in color, and if they do not 

 belong to the same individual as those just described, they, at least, probably be- 

 longed to the same species. 



The atlas is about one-fifth larger than in the common ox, but it does not fit the 

 condyles of the specimen, which has been described, of the cranium of Bison 

 latifrons, being a little too small. Its exact measurements are as follow : 



Breadth transversely . . . . . . .91 inches. 



Breadth of transverse processes; greatest, obliquely and 

 antero-posteriorly ........ 6 



Diameter of the spinal canal posteriorly, nearly . . . 2i 

 Depth from spinous process to front tuberosity of the body 4J " 



The metatarsus is of the right foot, and is about an inch longer than those attri- 

 buted to the Buffalo from Big-bone Lick, and is one-third more robust. Its 

 measurements are as follow : 



Length 101 inches. 



Breadth of proximal articulation . . . . . 21 " 



distal " 3 " 



Circumference at middle . . 5J " 



BISON ANTIQUUS, LEIDY. 

 Proc. Acad. Nat. Sci. Vol. VI. p. 117. 



This species is proposed with some hesitation upon the greater portion of a right 

 horn-core, with a small fragment of the os frontis attached (Plate V., Fig. 1). 

 The specimen indicates an animal intermediate in size to the recent Bison Ameri- 

 canus and the Bison latifrons, as characterized in the preceding pages. It was 

 found at Big-bone Lick in association with remains of the recent Buffalo, and belongs 



