' 22 J Kellogg: Pinnipeds from Miocene and Pleistocene Deposits 59 



Delfortrie 62 thought he had discovered two forms belonging to this 

 family in the Aquitanian shell marl of the Bone Breccia of Saint- 

 Medard-en-Jalle, near Bordeaux, France. Owing to the fact that 

 he based his Otaria oudriana on a last upper molar, and his Otaria 

 leclercii on an outer lower incisor, the relationship of these forms is 

 also questionable. Of these two forms, Otaria oudriana shows the 

 closest approach to the otarid tooth, though the other, Otaria leclercii, 

 is quite unlike any of the known otarids. The Otaria pri-sca which 

 Gervais''' 3 described from the Miocene sandstone at Uzes, in the 

 Department of Gard, France, was considered by Van Beneden 64 to 

 belong to Squalodon instead. In view of the above facts Allen 65 con- 

 cluded that none of the remains described as otarids may be accepted 

 as satisfactory proof of the presence of the family Otariidae in the 

 Tertiary of Europe. 



During the Tertiary period, the Otariidae passed through many 

 adaptive changes but we have no evidence to show that they were 

 at any time as abundant in the number of genera as they are at the 

 present time. In the Lower Miocene of South America, Arctocephalus 

 first makes its appearance. Ameghino 66 described Arctophoca fischeri 

 (= Arctocephalus fischeri), which was discovered in the "Piso pata- 

 gonico de la formacion patagon^a" in the Province of Parana, Argen- 

 tina. This specimen very closely resembles Arctocephalus avstralis. 

 The exact horizon in Oregon from which Desmatophoca oregonensis 

 was collected is uncertain but, apparently, it comes from .the same 

 Miocene shales which yielded the Desmostylus hespcrus figured by 

 Hay. 67 The earliest known otarid from the Pacific coast is the Allo- 

 desmus Jcernensis described in this paper. An additional tooth, which 

 exhibits considerable resemblance to Allodesmus, has just recently been 

 collected in the Vaqueros formation close to the stage station near 

 the town of Bakersfield. Otarid remains have also been found in the 

 diatomaceous earth at Lompoc, and an otarid metacarpal has been 



«2 Delfortrie, E., Les Phoques du falun aquitanien. Act. Soc. Linn, de Bor- 

 deaux (3), vol. 8, pp. 383-386. 1872. 



83 Gervais, P., Zool. et Paleont. franchises, ed. 2, p. 275, pi. 8, fig. 8. 1859. 



04 Van Beneden, P. J., Description des ossements fossiles des environs d'Anvers. 

 Ann. Mus. Koy. Hist. Nat. de Belgique, vol. 1, pt. 1, p. 57. 1877. 



65 Allen, J. A., History of North American Pinnipeds. Misc. Publ. No. 12, 

 U. S. Geol. and Geogr. Surv. Terr., Dept. Interior, pp. 218-219. 1880. 



oo Ameghino, P., Oontribueion al conocimiento de los mamiferos fosiles de la 

 Republica Argentina, p. 342. Buenos Aires, 1889. 



67 Hay, O. P., A contribution to the knowledge of the extinct sirenian Desmo- 

 stylus hesperus Marsh. Proc. U. S. Nat. Mus., vol. 49, No. 2113, p. 383. 1915. 



