MAMMALS OF THE MEXICAN" BOUNDARY. 



189 



following the curve, 180; from the burr to the fork in a straight line, 

 124; longest tip, 52; shortest tip, 50; circumference of burr, 7;^j ; 

 circumference midway between burr and tines, 49 ; circumference of 

 tines, 25 and 35. Weight estimated at 70 pounds avoirdupois. 



Cranial characters, — The skull of 0. crooki (fig. 18) has very nearly 

 the same conformation as that of Odocoileits columibianus^ the lachry- 



FlG.. 19.— DiAGKAM SHOWING POSITION 01' V(»MKK WITH RELATION TO BASI-Sl'XENOID. a, ODOCOILEUS 



HEMIONL'S CANL'.s (Cat. No. 63144, U.S.N.M.); h, odocoileus couesi (Cat. No. 59229, U.S.N.M.); a, 

 ODOCOII.EUS crooki (Type, Cat. No. 35752, U.S.N.M.). 



mal fossa being deeper than in the Virginia deer, but shallower tfem 

 in the mule deer. The same intermediate condition obtains with 

 respect to the vomer (fig. lOc), in the relationships of the nasal and 

 premaxillary bones; and, in short, the whole animal appears to be a 

 compromise between the characteristics of the white-tailed and mule 

 deer groups. For the characters of the teeth see fig. 20. 



Cranial measitrements of tiro ^perhaeii,!^ of Odocoileus cTook'i. 



Measurement, 



Total length of skull 



Greatest breadth of skull 



Distance between orbits, measured opposite center 



Distance between pedicels of horns :'. 



1 Nasal bones, greatest length 



Nasal bones, greatest breadth of pair 



Nasal bones, least breadth of the pair .' 



From tip of nasal to tip of premaxillary bone 



Total length of premaxillary, measured in situ 



Premaxillary bones, from front to premolars 



Premaxillary bones, from front to hinder margin of palate 



Length of upper toothrow 



Distance between first upper premolars 



Distance between last upper molars 



Width of bony palate in front of teeth, at narrowest part 



From hinder margin of molars to tip of paroecipital process . . . 

 From posterior molar to anterior margin at foramen magnum. 



Length of lower jaw, measured to end of eoronoid process 



From cutting edge of inner incisor to first premolar tooth 



Lower jaw, from angle to end of eoronoid process 



Length of lower lateral toothrow 



Lachrymal fossa, length 



IT Q Wor Irnaleimma- 

 ^'Pi^- 169.) 



255 

 108 



18 

 63 

 69 

 80 

 103 

 77 

 30 

 40 

 16 

 77 



260 

 110 

 72 

 62 

 82 

 27 

 13 

 57 

 67 

 82 



73 

 34 

 45 

 19 



100 

 81 

 30 



