KELLOGG — NEW PINNIPED FROM UPPER PLIOCENE 
213 
and thus far no limb bones have been recorded from the Empire forma- 
tion. Until such are found, it will be impossible to show the relation- 
ships of Pontolis to other otarids known only from hmb bones that 
have recently been discovered in the Tertiary deposits of the Pacific 
Coast. Desmatophoca oregonensis^ from Yaquina Bay, Oregon, has 
much the same status, as nothing more than the skull and the lower 
jaw have been recorded. Both of these specimens belong to con- 
siderably older formations than the Paso Robles. No fossil walrus 
remains have thus far been described from the Pacific Coast of North 
America, and their apparent absence from Tertiary deposits of this 
coast has not been satisfactorily explained. 
The fossil pinniped discussed in this paper has many characters in 
common with the genera Eumetopias and Odobenus. The humerus 
resembles Odobenus in the thinness of the external margin above the 
outer condyle, and the extent to which the inner condyle is produced. 
The presence of a large articular surface for the trochlea on the head of 
the radius and a well-defined tubercle are additional points in common 
with the walrus. The large size of the ulna, especially the distal end, 
shows a further approach to the odobenid type. The position of the 
articular surfaces on the styloid process and the extent of the radial 
facet on the distal end of the ulna resembles Eumetopias more closely 
than Odobenus. The general appearance of the humerus, with the 
exception of the points previously mentioned, agrees with the otarid 
type. 
The possession of characters in common with both the Otariidse and 
the Odobenidse introduces a serious problem in the allocation of this 
fossil to its proper family. Moreover, since nothing is known concern- 
ing the skeleton of Pontolis, any determination must be regarded as 
more or less provisional. In consequence of these facts the writer 
tentatively refers this specimen to the family Otariidse. 
Pliopedia pacifica gen. et sp. nov. 
Type. — No. C. 537, Stanford University. Species based upon a number of 
incomplete bones including a humerus, radius, ulna, three metacarpals, two 
metatarsals, and three phalanges. 
Locality . — In uncharted section of Township 29 South, Range 13 East (San 
Luis Quadrangle), on summit of hill one mile southeast of Santa Margarita, 
^ Condon, T., Univ. Oregon Bull., suppl. to vol. 3, no. 3, pp. 5-14, pis. 1-2, 
text figs. 1-3, Eugene, Oreg., 1906; Wortman, J. L., Science, n.s., vol. 24, no. 
603, pp. 89-92, 1906; Hay, O. P., Proc. U. S. Nat. Mus., vol. 49, no. 2113, p. 383, 
Washington, D. C., 1915. 
