1921] Frick: Faunas of Bautista Creeh and Sati Timoteo Canon 341 



Canidae 



canis? and felis? 



The collections from the Eden inclvide two upper and one lower 

 canine tooth of stout, dog- or w'olf-like form, Univ. Calif. Coll. Vert. 

 Pal. nos. 24019, 24020, and 24021 (figs. 45a^45c) ; and two upper 

 canines of more slender character possibly referable to Felis, Univ. 

 Calif. Coll. Vert. Pal. no. 24022 (fig. 47) and no. 24023 (fig. 48), loc. 

 3269. 



SMILODON?, sp. 



A third upper incisor, Univ. Calif. Coll. Vert. Pal. no. 24024 

 (fig. 46), Univ. Calif, loc. 3269, recalls the well marked ridge or heavy 

 cingulum occurring characteristically in the sabre-toothed group, the 

 specimen evidently representing some one of the smaller forms. 



Uesidae 



Until of late very little has been known of the history of the bears 

 in America previous to Pleistocene time and the appearance of Arcto- 

 tlieri'Um and Ursus. While Ursus is believed to have been a late 

 emigrant of eastern origin, Arctotherium, which is unrepresented in 

 the collections of the Old World, is considered to be an American 

 development of an earlier arrival of more primitive European stock. 

 The presence of such a pre-Pleistocene bear in the Western Hemisphere 

 was first suggested in 1910 by Dr.. Preudenberg^" on the discovery 

 in the Tehuicliila of IMexieo of a large lower carnassial of hyaenaretid 

 character. More recently the occurrence in the American Pliocene of 

 several primitive bear forms has been definitely determined through 

 the separate researches of Messrs. Sellards, Merriam, and Barbour, 

 who have named three different forms : 



Agriotherium (Hyaenarctus) schneideri Sellards, based on a 

 lower mandible from the Bone Valley formation of the Florida 

 Alachua. ' . , 



Indarctos oregonensis, Merriam, Stock and Moody,^^ based on the 

 incisors, canines, P^ and M^ of the upper jaw, and M^ of the lower, 

 as well as portions of associated limb bones from the Rattlesnake. 



29 Freudenberg, W. Geo. Palae. Abh., N. F. Bd. 9, 1910. 



30 Sellards, E. H. Sth Ann. Eept. Florida State Geol. Surv., 1916. 



31 Merriam, .John C, Stock, Chester, and Moody, C. L. An American Pliocene 

 Bear. Univ. Calif. Publ., Bull. Dept. Geol., vol. 10, pp. 87-109, 1916. 



