FIFTH ANNUAL REPORT. 121 
December, 1900. Mr. Payne describes the animal as being ‘‘ smaller than 
the Big Horn, color a sort of slate, with white belly and inside of legs, 
also white rump; tail, the same color as the back, and connected with it 
by a stripe about an inch in width.” 
It is probable that the Mountain Sheep inhabiting the following locali- 
ties are referable to the newly discovered species, Ovis mexicana. 
Texas.—Guadaloupe Mountains. 1900.—D. M. Payne. 
New Mexico.—Organ Mountains, southeast of Las Cruces. 1901.— 
G. J Jones. 
International Boundary and Mexico, forty miles southeast of Deming, 
New Mexico. From this locality specimens in the flesh were, in 1900, 
brought to Deming, and sold in a meat market. 1900.—C. J. Jones. 
Seri Mountains, on the mainland opposite Tiburon Island. ‘‘ As ob- 
served at a distance of 150 yards, the adult male bore no visible marks of 
difference from Ovis montana as seen [by the same observer] in Nevada.” 
1898.—Willard D. Johnson, U. S. Geol. Survey. 
I have had the privilege of examining all these specimens and 
comparing them with Dr. Merriam’s collection of Ovis nelsoni. 
The two species are strongly alike in color, and show that the 
pelage of both these offshoots from Ovis montana have been 
similarly affected by the aridity and heat of the country they 
inhabit. Both these species lack the deeply concave forehead of 
the Big Horn, but the large molars and large ears of Ovis mexi- 
canus render it impossible to do otherwise than to recognize it 
as a distinct species. 
Of course it will be understood that in assigning to this, and 
the preceding species, certain contiguous localities in which 
Mountain Sheep are known to occur, but from which no speci- 
mens have been secured for identification, the author is only at- 
tempting to suggest what seems to him reasonable probabilities. 
Under the name of Ovis canadensis audubon, Dr. Merriam 
also describes (Proc. Biol. Soc. of Washington, p. 31, April 5, 
I901) a new sub-species of the Big Horn, based upon a single 
skull, and with no skins available. The full description is as 
follows: 
Type from “Upper Missouri.”—No. #f3% 6 yg.-ad. U. S. National 
Museum. Believed to have been collected in the Badlands of South Dakota 
in 1855 by Dr. F. V. Hayden, on the Warren Expedition.* 
*The U. S. National Museum register contains entries of several Mountain 
Sheep collected by Dr. F. V. Hayden on Lieut. G. K. Warren’s Expedition to the 
Upper Missouri in 1855. In Lieut. Warren’s report on his ‘‘ Explorations in the 
