194 University of California Publications in Geology. [Vol. 6 



posterior metapodial has approximately the same relative posi- 

 tion as in the prong-horn, being slightly more median than is 

 the case in the Cervidae. This groove is emphasized to about the 

 same degree in C. ( ?) minor as in Antilocapra americana, being 

 very shallow for the middle part of its length. The fossa ex- 

 ternal to the proximal end of the median anterior groove is pro- 

 nounced, as in the prong-horn. The posterior median groove, 

 while in general like that in Antilocapra, is wider. As in the 

 prong-horn it becomes practically obsolete distally. In one 

 specimen of the new form (no. 12516) the posterior groove, 

 while deeper and considerably wider than it is in the Antilocapra, 

 is very close to the latter form in the distal region. 



Phalanges. — Two tiny toe-bones are in outline nearer to 

 corresponding parts of Ilingoceros than to any other form of 

 deer or antelope at hand. Their dorsal contour is slightly 

 humped as in the twisted-horned antelope, but not nearly so 

 much as in Antilocapra. The "Roman nose" effect, so evident 

 in the latter, is consequently not so well developed. On the 

 other hand, the dorsal contour is not straight as it is in 

 Odocoileus. 



Astragal its. — The ankle-bone shows certain minor differences 

 when compared with corresponding parts of Antilocapra ameri- 

 cana and Ilingoceros alexandrae. Viewed dorsally the little knob 

 to the right of the central fossa, continuous with the inner sur- 

 face of the right side of the trochlea, is not so much developed 

 as in Ilingoceros, in which it in turn is not so prominent as in 

 Antilocapra. The anterior fossa upon the right lateral aspect of 

 the astragalus (fig. 56) is slightly more extensive than in Ilingo- 

 ceros, in which form the same fossa is a little more extensive 

 than in Antilocapra. The posterior fossa is shallower in Capro- 

 meryx( l) minor than in either of the other forms mentioned, 

 being nearer Ilingoceros in this respect. 



Viewed upon its left side, the astragalus is nearer to Ilin- 

 goceros. On the dorso-proximal articular surface, seen from the 

 left side, there is, as in the Ilingoceros, less of a groove than in 

 Antilocapra. Furthermore, the rounded articular surface of this 

 region does not swing around ventrally so far as in the prong- 

 horn, resembling Ilingoceros also in this respect. The dorsal 



