FOSSIL VERTEBRATES FROM SAN PEDRO VALLEY—GAZIN 517 
riorly and the anteroexternal styles are less developed, as is the style 
on the anterointernal angle of M; of the Florida dentition. 
Cf. CAPROMERYX GIDLEYI Frick 
FIcure 47 
A right maxillary portion, No. 12873, with incomplete second and 
third molars, and a portion of a right lower jaw, No. 12874, with M, 
to M,;, were referred by Gidley to Merycodus. As with the Benson 
teeth, those in the Curtis ranch jaws are recognized as of an anti- 
locaprid type. Unfortunately none of the premolars are preserved 
and the molars in both specimens are badly broken down, but those 
in the lower jaw are approximately of the size and hypsodonty seen 
in the type of Capromeryx furcifer figured by Matthew.” 
Frick (1987, p. 529) proposed the 
name Capromeryx gidleyz for an an- 
tilocaprid represented in his collec- 
tion from Curtis ranch by an incom- 
plete horn core. This he considered 
as of the Capromeryzx type; however, 
as pointed out by Hesse * and by 
Stirton * the type of horn core pos- 
sessed by true Capromeryx remains 
somewhat in doubt. The jaw frag- 
ments in the National Museum col- 
lection may well represent the same 2 
form of antilocaprid as that indi- Ficure 47.—Cf. Capromeryx gidleyi 
Tiel ices eet (OL 
cated by the horn core, although this N.M. No. 12873), Ee ee 
is uncertain. sal views. X34. Curtis ranch 
Pleistocene, Arizona. 
35; 
Cf. ODOCOILEUS sp. 
Remains of a large deer in the Curtis ranch collection include a 
right lower jaw portion, No. 12872, with Dp.-Dp, and M,—M,, frag- 
ments of the jaw of a second individual with P, and M,, limb frag- 
ments and portions of antlers. Structurally the material) closely 
resembles that of Odocoileus, but some of it is a little larger and more 
robust than corresponding material of particularly large individuals 
of both black-tailed deer, as represented in Colorado, and the white- 
tailed deer of North Dakota. The teeth in the Curtis ranch form in 
addition to their larger size appear to be slightly more hypsodont 
and the styles between the outer lobes of M, and Dp, more sturdy than 
50 W. D. Matthew, Bull. Amer. Mus. Nat. Hist., vol. 20, art. 7, pp. 126-127, fig. 20, 1904. 
51C. J. Hesse, Journ. Mamm., vol. 16, No. 4, pp. 507-315, 1935. 
2 R. A. Stirton, Journ. Mamm., vol. 19, No. 3, pp. 366-370, 1938. 
