KELLOGG — ^NEW PINNIPED FKOM UPPER PLIOCENE 
225 
on the dorsal face there is present a shallow depression. On the radial face of the 
head are two smooth surfaces; one is somewhat flattened and slopes obliquely 
to the palmar face; the other is slightly concave and faces proximally. The 
palmar face of the shaft on the proximal end is strongly concave. 
The determination of the remaining four bones is very difficult, owing to the 
want of a complete series of the bones of either the metacarpus or the metatarsus. 
Moreover, the similarity of these elements to one another introduces another 
element of doubt when one attempts by comparison with living otarids to allo- 
cate these bones definitely. In consequence of these difficulties the following 
determinations of these bones must be regarded as more or less provisional. 
Right Metataksal II ? of PUovedia pacifica X i, No. C. .537, Stanford 
University . 
Santa Margarita, California: fig. 9, proximal view 
The best preserved of these four bones is assumed to be the third metacarpal 
on the left side. Its proximal surface is strongly concave from before backward. 
This surface is continuous with a shallowly concave facet (fig. 8a) on the radial 
face. On the ulnar surface of the base (fig. 8b) near the dorsal border is a con- 
cave facet for articulation with the adjoining metacarpal. This third meta- 
carpal is somewhat expanded at the base and to a less extent at the head (fig. 8c) ; 
the shaft curves inward to a greater degree than is normal in Eumetopias. 
10a ' -lOb 
Right Metacarpal IV ? of Pliopedia pacifica X i, No. C. 537, Stanforo 
' University 
Santa Margarita, California: fig. 10a, plantar view; fig. 10b, tibial view 
