CONDYLARTHRA. 505 



trochlear crest is much less elevated than the outer, and is obtusely rounded. 

 The inner side of this part of the astragalus is oblique, and has a centi-al 

 fossa and a prominent shelf-like angle below it. The external face is ver- 

 tical; it is separated by a groove from the concave calcaneal facet below. 

 The trochlear groove is shallow, and extends to the inferior face posteriorly, 

 after a posterior interruption by the ligamentous fossa. The sustentacular 

 facet is a long oval, isolated all round. The neck is long and diverges from 

 the axis of the trochlea. The navicular face is oblique to the base of the 

 astragalus, in the same direction as the trochlea, but more so. It extends 

 a little on the internal side to a point. On the external side the articular 

 surface does not extend so far posteriorly, and is broadly rounded. In 

 common with the entire astragalus, it is depressed. 



Measurements of tarsus. 



M. 



Length of calcaneum 0215 



Deptb of calcaueum at middle 009 



Depth of calcaueum at astragalar condyle 0116 



Width of calcaneum at sustentaculum 014 



„. . 1 • 1 i- i (vertical.. 009 



Diameters cuboid lacet < 



( transverse 009 



Length of astragalus (total) 020 



Length of trochlea on external side 0115 



Height of trochlea on external side 0085 



Width of trochlea at middle above 0085 



Width at trochlea below 013 



vertical 007 



Diameters head , 



< transverse 009 



The phalanges preserved are flat, much like those of Phenacodus. 

 Ungues not obtained. 



Restoration. — This species was about the size of a fox, but with a very 

 different physiognomy. The profile was curved, the muzzle short, and the 

 eyes large. The body was not so slender as in Phenacodus or a fox, having 

 the more robust proportions of a raccoon. The fore and hind legs were 

 rather short, and of equal length, so that the rump was not elevated as in 

 the peccary. There was a large tail. The species is one-third (linear) 

 larger than the Hyrax capensis. It was probably a vegetarian. 



The Meniscotherium terrceruhrce differs from the M. chamense in two 



