374 University of California Publications in Geology [Vol. 12 



"Wortman's figure (fig. 20) of P. gracilis,^- and the apex of the suture 

 line between the palatine and maxillary occurs opposite the anterior 

 edge of Dp- versus that of M- as in P. gracilis. There is also an 

 interesting suggestion of the maxillary fossa which is present in 

 Pliauchenia gigas, Alticamelus,^^ and Camelops, but absent in Auchenia 

 and Camelus. The second molar has not come into use, Dp- and Dp- 

 still remain in place. and the deciduous molars are furnished with 

 well developed para.styles and mesostyles, both being much more 

 prominent than in the referred lower teeth. A cingulum crosses the 

 inner extent of the posterior lobe of the first molar near the summit. 

 Dp- is quadrate and molariform. 



90a 



Fig. 89 to 006. Procamc'lus?, indet. sp. Fig. 89, anterior portions of pre- 

 maxillaries with canines and incisors, no. 23430; figs. 90o, 90b, incisors, no. 1053; 

 ' X 1. Eden beds, California. 



Specimen no. 23434, from the same locality, represents a more 

 mature stage, M^, M- being in place. The teeth are slighly heavier, 

 otherwise similar to those of the preceding specimen. 



Measurements of No. 23434 



Ml, anteroposterior diameter 23.5 mm. 



Ml, transverse diameter 17 



M-, anteroposterior diameter 21 



M-, transverse diameter 19.5 



Specimen no. 23430 (fig. 89). The sharp, pointed premolars are 

 recurved and caniniform. and greatly exceed the small canines in size. 

 Long diastemas lie anterior and posterior to the canines, and are 

 arched in the usual manner. The form apparently differs markedly 

 from that described under Procamelus edensis raki, type specimen, 



52 Wortman, Jacob L. The Extinct Camelidae of North America and Some 

 Associated Forms. Bull. Am. Mus. Nat. Hist., vol. 10, fig. 20, p. 125, 1898. 



58 Matthew, W. D., and Cook, Harold J. A Pliocene Fauna from Western 

 Nebraska. Bull. Am. Mus. Nat. Hist., vol. 26, pp. 361-414, 1909. Merriam, John 

 C. The Skull and Dentition of a Camel from the Pleistocene of Eancho La Brea. 

 Univ. Calif. Publ., Bull. Dept. Geol., vol. 7, pp. 305-323, 1913. Scott, W. D. A 

 History of Land Mammals of the Western Hemisphere, p. 398, 1913. 



