X 9 O 3-] Allen, Mammals from New Mexico ana Durango. 593 



as follows: Total length, 248; occipito-nasal length, 201 ; basal length 

 of Hensel, 220; zygomatic breadth, 115; least interorbital breadth, 

 61.5; mastoid breadth, 85.5; greatest length of nasals, 77; greatest 

 width of nasals, 31; length of upper premolar-molar series, 69.5; 

 length of lower jaw (from angle to outer base of middle incisors), 192 ; 

 height at condyle, 64; height at coronoid, 96; alveolar length of lower 

 premolar-molar series, 72. The antlers have a moderate bur, are 

 nearly smooth, even proximally; beam round and rather heavy, with 

 the usual basal tine and two points, one a little behind the middle, the 

 other at the beginning of the posterior fourth, which with the tip of 

 the main beam make four points, all rather short and heavy. Length 

 of main beam along external curvature, 353 ; distance from bur to top 

 of fork of first point in straight line, 71, to second do., 179, from second 

 to third do., 103 ; length of main beam beyond last point, 98 ; distance 

 between burs, 56, distance between tips, 218; greatest expanse, inside 

 measurement, 340. Four other males, somewhat younger, have horns 

 of similar character, but of much lighter weight and less developed 

 points. 



An adult female skull: Total length, 230; basilar length of Hensel, 

 203; occipito-nasal length, 190; length of nasals, 72; greatest width 

 of nasals, 21; zygomatic breadth, 96; least interorbital breadth, 56; 

 mastoid breadth, 66.5; length of upper premolar-molar series, 65; 

 length of lower jaw, 176; height at condyle, 57; height at coronoid 

 86.3; lower premolar-molar series, 71. 



Represented by 19 specimens (6 adult and 3 young males, and 9 

 adult females and i young female), collected as follows: Rosario, 2, 

 Jan. 27 and 28; Mt. San Gabriel, i, Jan. 28; Rancho Santuario, 5, 

 March 10-1 1 ; La Cienega de las Vacas, 1 1 , March 26-April 6. There is 

 also an additional skull, "picked up on the'plains," which in shape of 

 antlers, the very broad antorbital vacuities, and the perforated lachry- 

 mal pit, agrees with O. couesi and not with the rest of the series. 



Odocoileus battyi closely resembles externally O. couesi but 

 differs greatly in cranial details, as above described. All of 

 the deer of the arid regions of Arizona, Sonora, Chihuahua, 

 and Durango, of the O. virginianus style of antlers, appear to 

 present great similarity of coloration, but are found to differ in 

 general size, in the size and shape of the antlers, and more 

 or less in cranial characters, when specimens from distant 

 localities are compared. As stated by me long since (this 

 Bulletin, VII, 1895, p. 200), 0. couesi, as first said by Coues and 

 Yarrow, is the Cariacus mexicanus of Baird (excluding his 

 synonyms), but is not the Cervus mexicanus of Gmelin and 



[November, 1903.] 38 



