1921] Frick: Faunas of Bautista Creek and San Timoteo Canon 345 



Comparative Measurements 



Tvpe Referred 



Univ. Calif. Univ. Calif. 



Coll. Vert. Coll. Vert. H. sival- H. punja- Indarctos H. palae- 



Pal. 24025 Pal. 24027 enaia biensia oregonensis indicus 



greatest antero- 

 posterior length.. 34.4 mm. 32.3 mm. 32.9 mm. 31. .5 mm. 31.7 mm. 



Pi, greatest trans- 

 verse width 2.5.8 21.7 19.7 22.2 22.6 



Pi, greatest height 



of crown 11.3 12.9 11.4 



Univ. Calif. 

 Coll, Vert. 

 Pal. 24026 



M-, greatest antero- 

 posterior length.. 30.6 30.4 29.8 27.5 mm. 



Ml, greatest trans- 

 verse width , 32.2 26.5 27.3 26.4 



M-, greatest antero- 

 posterior length.. 27.9 25.3 30 



M-, greatest trans- 

 verse width 30.4 26.8 19.2 



Comparisons. — The teeth differ from those of the modern bears, 

 and show the following hyaenarctid affinities : 



1. A large tubercle (protostyle) is present in the tooth anterior to 

 the protocone, this tubercle being absent in Vrsus and corresponding 

 to that of the hyaena (it is suggested in some specimens of A^rto- 

 therium) . 



2. The position of the inner tubercle (deuteroeone) is median and 

 anterior, instead of posterior as in the bears, thus approaching that 

 of the dogs. The inner tubercle is also larger than in Vrsus, and is 

 proportionately larger than in Arctotherimn. 



3. The carnassial is three-rooted, instead of two-rooted as in the 

 bear. 



4. The carnassial is longer anteroposteriorly than the (referred) M-^-. 



5. The referred first molar is a little broader than long antero- 

 posteriorly, thus somewhat resembling Arctotherinm and differing 

 from Vrsus, in which the corresponding tooth is oblong. 



Compared to Hyaenarctos sivalensis^^ the present specimens while 

 generally resembling the same, specifically differ as follows: (1) the 

 type tooth is larger (see table of measurements) and the ratio of its 

 length to breadth is 1.33 versus 1.8 in H. sivalensis; (2) the protostyle 

 is much larger, and it is placed directly in line with and anterior to 

 the two main cusps, resulting in giving the tooth a more even external 



33 Lydekker, E. Indian Tertiary and post-Tertiary Vertebrata. Mem. Geol. 

 Surv. India, ser. 10, vol. S, pp. 220-225, 1884. 



