EXTINCT BISONS OF NORTH AMERICA— HAY. 



183 



Measurements of skulls of Bison alleni. 



By far the most complete skull of a fossil bison yet found in North 

 America is one which is here identified as B. alleni and which was 

 discovered during mming operations on Hunter Creek just below 

 the mouth of Dawson Creek and about 6 miles southeast of Rampart, 

 Alaska. It was found on the top of gravel beneath 20 feet of sUt. 

 James Nelson, the finder, appreciatmg the scientific value of such a 

 rare specimen, carefully exhumed it and shipped it to Henry M. 

 Eakm, of the United States Geological Survey. From him it was 

 purchased by the writer, and it is now deposited in the United States 

 National Museum under the number 7706. The specimen consists 

 of the skull nearly complete, including the lower jaws and five cer- 

 vical vertebrae (pis. 16, 17). From the skull are missing most of the 

 right malar bone, a part of the right zygomatic process of the squa- 

 mosal, the ethmoid bones and vomer, the left coronoid process of 

 the lower jaw, all the upper premolar teeth, the lower incisors and 



