302 University of California Publications in Geology [Vol. 12 



Antilocapra type in the character of the median groove of the distal 

 end, which is shallow and continuous with the slope of the adjacent 

 condyle, and in the presence of but the single inner trochlea-knob on 

 the dorsal surface. Furthermore, the posterior facets of the navicular- 

 euboid articulating with the cuneiform lie at a right angle instead of 

 an acute angle as seen in Odocoileus. The calcaneum is lighter and 

 apparently shorter, and the first and second phalanges narrower and 

 considerably lighter than in 0. heniionus. 



EQUUS BAUTISTENSIS, n. sp. 



Type. — Three associated premolars from the left side of an upper jaw, Univ. 

 Calif. Coll. Vert. Pal. nos. 23239, 23238, 2324.5 (folder 2, fig. 1), Univ. Calif, loe. 

 3243. To this species is referred all of the Bautista equine material, including 

 upper and lower cheek teeth, incisors, and limb elements, as enumerated and 

 described below (figs. 19-25, folder 2, pi. 45). 



Referred Material. 



Upper cheelc teeth: Three molars of the left side of the upper jaw, figured in 

 series with the type premolars, Univ. Calif. Coll. Vert. Pal. nos. 23245, 23246, 

 23247, Univ. Calif, loc. 3243 (folder 2). 



A compiled right series of unassociated teeth from ujiper jaw, all from the 

 same locality as the type (folder 2, fig. 2), Univ. Calif. Coll. Vert. Pal. no. 23236, 

 Univ. Calif, loc. 3244. 



A partly associated series of worn teeth from upper right jaw (folder 2, 

 fig. 3), Univ. Calif. Coll. Vert. Pal. no. 23244, Univ. Calif, loc. 3244. 



Lower cheek teeth: A fragment of mandible containing associated lower series 

 (lacking Mj), (figs. 19, 23), Univ. Calif. Coll. Vert. Pal. no. 23196, Univ. Calif, 

 loe. 3243. 



Section of a mandible with portions of all the series except Pj (figs. 21, 24), 

 Univ. Calif. Coll. Vert. Pal. no. 23913, Univ. Calif, loc. 3240. 



A'arious lower cheek teeth (figs. 20a-20P, 22o-22c), Univ. Calif. Coll. Vert. 

 Pal. nos. 23241, ^3248, '2^252, 23250, 23241a, 23249, Univ. Calif, loc. 3243. 



Incisors: A set of incisors in a fragment of the premaxillary (fig. 25), Univ. 

 Calif. Coll. Vert. Pal. no. 23348, Univ. Calif, loe. 3243. 



Limh elements: A metacarpus (pi. 4.5, fig. 1), Univ. Calif. Coll. Vert. Pal. no. 

 23460, Univ Calif, loc. 3245. 



The proximal and distal portions of a second metacarpus associated with the 

 first, second, and portion of a third phalanx, unciform, magnum, trapezium, and 

 scaphoid (pi. 45, fig. 2), Univ. Calif. Coll. Vert. Pal. no. 23466, Univ. Calif, loc. 

 3242. 



An associated series of bones of the right hind limb from Univ. Calif, locality 

 3241, as follows: 



Proximal and distal portions of femur (pi. 4.5', fig. 6), no. 23489. 

 Proximal half of tibia (pi. 45, fig. 7), no. 23472. 

 An astragalus and calcaneum (pi. 45, figs. 3b-3f), no. 23463. 

 Third metatarsal with first and second phalanges (pi. 45, fig. 3a), no. 23459, 

 Univ. Calif, loc. 3241. 



