192 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



occipital crest and the nasals, the difference is less between the 

 Siberian and Alaskan skulls than in the other two species. Of course 

 additional specimens of the Siberian and Alaskan forms would 

 probably increase the difference. In the case of the width of the 

 skull between the horn-cores, this is greater between the Siberian and 

 the Alaskan skulls here compared than it is among all the other 

 skulls; but the range in Bos primigenius is nearly as great. The 

 great difference between the Vilni River skull and that from Hunter 

 Creek may be indicative of a difference of species; future investiga- 

 tion must settle this. The differences found in the cases of the widths 

 at the rear of the orbits and at the ear openings are not so great, and 

 hence not so important perhaps. The figures in the last two columns 

 show how variable are the skulls of the Bovidee. It is to be noted 

 likewise that the range of variation among the skulls of the extinct 

 Bos primigenius is much greater than in the case of the existing 

 European bison. 



In case it shall result that HUzheimer's Bison europseus lenensis 

 is specifically the same as Bison alleni, the former name must be 

 regarded as a synonym of the latter, this having been established in 

 1877. 



BISON LATIFRONS, Leldy. 



This species is treated incidentally under the succeeding one. 



BISON REGIUS, new species. 



Diagnosis. — A species related to B. latifrons, but haviag the horn- 

 cores relatively longer, slenderer, and more strongly curved. Teeth 

 with the enamel of the "lakes" furnished with reentering folds. 



In the American Museum of Natural History there is a fine skull 

 of a fossil bison which bears both horn-cores. This skull the writer 

 has been pm-mitted to study and describe; and likewise he has been 

 furnished with the photographs from which have been prepared the 

 figures here shown (pi. 18, figs. 1,2). These present admirably the 

 form and proportions of the skull and the characters of the horn-cores. 



This very interesting specimen was found in the vicinity of Hoxie, 

 Sheridan County, Kansas, in 1902, by Frank Lee and Harle}^ Hender- 

 son. It was sold by them to Charles H. Sternberg and transferred by 

 him to the American Museum of Natural History. This accession to 

 the Museum was reported by Dr. W. D. Matthew ^ under the name 

 Bison latifrons. An f ~^count of the discovery is given by Mr. Sternberg 

 in his The Life of a Fossil Hunter, page 267, and the skull is illustrated 

 by a figure. From this source are learned the circumstances con- 

 nected with the discovery of the skull. The Missouri Pacific Railway 

 Co. had shortened a creek by making a cut across a bend in it, and 

 in doing so had come within about 2 feet of the skull. During a 



1 Science, vol. 29, 1909, p. 198. 



