370 THE WASATCH FAUNA. 



Will til bflow third troohaiitor 032 



Width above condyles 061 



Width of condyles 058 



Width of rotiilar groove 030 



Depth i>( inner condyle with rotular crest 05d 



The tibia has a nearly straight shaft, which is rather slender below. 

 Its section below the head is triangular, the base being posterior. That of 

 the inferior front of the shaft is also triangular, the base of the triangle 

 being the inner side. The crest is quite prominent, not flat, as in Ursus, 

 but not quite so strong as in Uncia concolor. It is replaced by a gentle 

 conve.xity just below the middle of the shaft. The inner femoral cotylus 

 does not overhang the inner side of the head. The latter has a wide, low, 

 longitudinal ridge posterior to the middle, which distinguishes conca\'ities 

 iinterior and posterior to it. The external femoral face is decurved poste- 

 riorly, and rises into a spine posterior to the middle of the boundary be- 

 tween it and the internal face. There is a transverse depression at the 

 summit of the spine. The latter has a superior and an inferior tuberosity. 

 The internal malleolus is produced. Its internal face carries a groove for 

 the tendons; part of the surface is damaged, so that more than one cannot 

 be determined. The trochlear face is divided into two fossae, which are 

 not so deep as those of M. ohtusidens. The fibular proximal facet is not 



Measurements of tibia. * ^ 

 Total lingth 275 



Dianirtors of head ^""'""P""*"'"'" (**"»!) ^ 



I transverse 062 



fore and aft 022 



transverse 023 



Wam.t.r.-. of distal end? ""♦•^"■"P""'"'''"^ *» 



Diameters just below middle of shaft \ ° 



I tr 



transverse 039 



The only tarsal bones preserved are the astragalus and calcaneum. 

 These were found nearly in place, adherent to the distal extremity of the 

 til)ia. They are about the size of those of the black bear, and larger than 

 tho.se of the M. ohtmldens. The astragalus has the same peculiarity as that 

 of the M. ohtusidens, in the distinct band-like facet of the external side of 

 the distal extremity for articulation with the cuboid bone; a peculiarity un- 

 kiiiiwn elsewhere among Creodonta and among Caraivora, The width of 

 this surface is about one-half that of the navicular surface, and it is of uni- 

 form width, extending obliquely to the middle line. The navicular face is 



