298 



University of California Publications. 



[Geology 



Measurements of Skull. 



Length from anterior side of premaxillary to posterior side of 



occipital condyles 395. mm. 



Greatest length from anterior side of premaxillary to inion 438.5 



Greatest width of zygomatic arches 281. 



Least width across muzzle behind superior canines 136. 



Width between outer sides of alveolar margins of superior ear- 



nassials - - - 139. 



Length from a line drawn between the postorbital processes of 



the frontals to the extreme occipital protuberance 197. 



Distance from upper end of foramen magnum to the posterior 



end of sagittal crest 88. 



Length of left ramus of mandible from extreme anterior end to 



posterior side of condyle 291.5 



Length of mandible from anterior side of canine at alveolar 



border to posterior side of condyle 289.5 



Height of lower jaw below protoconid of P 4 55. 



Height of lower jaw below protoconid of P 4 in F. atrox, type 



specimen 55. 



Thickness of lower jaw below protoconid of P 4 30.8 



DENTITION. 



Superior Dentition. — The upper teeth are unfortunately con- 

 siderably worn and broken, so that only P 3 remains absolutely 



intact. I 3 , P 2 , and M 1 had disap- 

 peared before the specimen was dis- 

 i ^ifcA covered. 



The superior canines are unfor- 

 tunately represented only by the 

 broken basal portions. They are rel- 

 atively large compared with the an- 

 teroposterior diameter of the cheek 

 teeth and compared with the length 

 of the skull. A number of detached 

 superior canines in the collection are 

 considerably smaller than that of no. 

 14001, but may represent another 

 species. 



The form of P 3 resembles that of 

 the modern African lion excepting in 

 the somewhat greater elongation of 



Fig. 3. — Felis atrox, variety 



bebbi. Eight superior car- 

 nassial; a, outer side; b, 

 occlusal view. No. 12501, 

 natural size. From the . ■>. n . ,, ,. , , 



Quaternary of Rancho La the CUS P S m the hon > and m the sllght- 

 Brea. [y larger size of the posterior basal 



