358 University of California Publications in Geology [Vol. 12 



(see scale drawings of limb elements), and to separate the light, 

 gazelle-like forms from the heavy and more typically Pliauchenia-like 

 species. The former are here tentatively placed under Procamelus, 

 originally described by Dr. Leidy from the Loup Fork of Nebraska, 

 and the heavier material under the genus Pliauchenia Cope. 



PLIAUCHENIA-LIKE SPECIES 



This group, as seen in specimens of the gigantic limbs and phalanges, 

 includes at least two distinct forms, one of which is also represented 

 by associated teeth. 



1. A new species, Pliauchenia merriami, based on the anterior 

 portion of the upper and lower jaws and on associated limb and foot 

 elements of large size, taken from one nodular deposit ; also represented 

 by certain tentatively referred material. 



2. A similar species, Pliauchenia, species A, which is represented 

 by the phalanges and limb fragments of a single camel from a second 

 nodular deposit. 



PLIAUCHENIA MERRIAMI, n. sp. 



Type. — The upper and lower jaws anterior to tlie cbeek series; complete 

 phalanges of fore and hind feet; portions of metapodials, carpus, and tarsus; 

 sections of radius, humerus, tibia, etc. The jaws and limbs were intimately 

 associated and without doubt belonged to one individual. Univ. Calif. Coll. 

 Vert. Pal. no. 23483 (pi. 47, figs. 1, 2, pi. 48, fig. 11, and figs. 66a, 666, 71a-71c, 

 92a, 93a, 94f), Univ. Calif, loc. 3270. 



Bef erred rnatericiL— Three molar teeth, nos. 23789', 23433, 23435 (figs. 68a-68c); 

 an upper premolar, no. 23416 (fig. 69); three incisors, nos. 23790, 23783, 23791 

 (figs. 67a-67c), and a canine, no. 23792 (fig. 70); portions of metapodials, carpus, 

 and tarsus, and other fragments of a slightly larger individual, no. 23484 

 (figs. 72a-726); and an unciform, no. 23492 (pi. 47, fig. 4). All specimens Univ. 

 Calif. Coll. Vert. Pal.; all from Univ. Calif, loc. 3269. 



Characters. — Large size, the elongation of the anterior portion of 

 the jaw and length of posterior diastema, the marked development 

 of the three upper and two lower caniniform teeth as compared to the 

 outer incisor of the lower jaw, and the close juxtaposition of this to 

 the peculiarly shaped canine. 



Detailed description. — The jaws (figs. 66a-666) are somewhat dis- 

 torted through lateral compression, the right alveolar border of the 

 upper ramus extending beyond the summits of the teeth of the left 

 side. The premaxillary terminates in the usual camelid beak-like 



