1913] 



Merriam: A Camel from BancJw La Brea 



323 



presence of well-defined maxillary fossae, relatively great anterior 

 extension of the zygomatic process of the squamosal, absence of 

 a lateral bordering wall on the glenoid fossa, and the higher 

 mandible which tapers more gradually anteriorly. 



The Camelops group as here comprised resembles Auchenia 

 in the general form of the skull and especially of the mandible, 

 the relation of the nasals and premaxillaries, relatively great 

 anterior extension of the zygomatic process of the squamosal, 

 form of the glenoid fossa, and in premolar formula. The group 

 differs from Auchenia in the form of the frontal region, nar- 

 rower nasals, presence of large maxillary fossae, form of the 

 mastoid process, more nearly quadrate form of P 4 , more distinctly 

 wedge-shaped cross-section of P 4 , absence of folds on medial side 

 of P 4 , less marked development of styles and ribs on outer side 

 of upper molars and inner side of lower molars, and absence of 

 strongly marked anteroexternal styles in M 2 and M 3 . 



Although a definite statement as to the affinities of Camelops 

 would be premature if presented in advance of a study of the 

 entire skeleton, it seems desirable to call attention to the resem- 

 blance in characters of skull and dentition in the Raneho La Brea 

 form to those of PUauchenia (Megatylopus) of Matthew and 

 Cook. 15 



i" Matthew, W. D., and Cook, II. J., Bull. Amer. Mus. Nat. Hist., vol. 

 26, pp. 396-401, 1909. 



