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JOUHNAL OF MAMMALOGY 
Among these four is the base of what is considered to be the second meta- 
tarsal. Its proximal end (fig. 9) is triangular in outline,' the articular surface 
slopes from the plantar to the dorsal border and is concave from side to side. On 
the tibial margin is a rounded process for the internal cuneiform, and more 
proximally and nearer the plantar border is a second facet for the same element. 
The base of the next bone to be considered is missing, and there is nothing 
distinctive about the shaft (fig. 10a) to indicate its true position, though possibly 
it may be the fourth metacarpal. The shaft (fig. 10b) is somewhat curved from 
the base to the head. 
The fourth bone to be discussed consists of a fragment of the base of what 
appears to be the fifth metatarsal but this lacks the epiphysis. It has not been 
figured and with the exception of the flattened triangular outline of the shaft and 
the long dorso-plantar diameter, there is nothing particularly distinctive about it. 
II 
Phalanges of Pliopedia pacifica X No. C. 537, Stanford University 
Santa Margarita, California: fig. 11, dorsal view of second phalanx; fig. 12, 
dorsal view of third phalanx; fig. 13, dorsal view of fourth phalanx. 
The phalanges of the forefoot were apparently very similar to those of Eu- 
metopias jubata, judging from the three which were collected. There is nothing 
remarkable or unusual about these bones, for they agree in all their principal 
features with those of Eumetopias and differ only in minor details of the facets 
and in the curvature of the shafts. The proximal facet on the base of the second 
phalanx is concave from side to side; the curvature of the shaft (fig. 11) is toward 
the radial side, and the facet on the head is convex from above downward. It is 
considerably longer than the third or fourth phalanx. The third phalanx (fig. 
12) is much stouter and shorter than the second and is essentially the same as 
the corresponding phalanx of Eumetopias jubata. The fourth phalanx (fig. 13) 
is slightly shorter and relative stouter than the third, and the head is equal in 
width to the base. 
Bureau of Biological Survey ^ Washington, D. C. 
