NIMRAVID^. 96 1 



M. 



("transverse, extreme 044 



_. ^ ,■,.,■, , „, 1 transverse of condyles 033 



Diameters of distal end of humerus'; . . . . ji /«.« 



I anteroposterior, at flange 020 



• (_ anteroposterior at middle of condyle 014 



Length of fifth metacarpal 039 



Transverse diameters I P'-°^i°'*^y 0"^ 



( distally (epicondyles) Oil 



From the above measurements it may be seen that the fifth metacarpal 

 bone is relatively only three-fifths as long as that of the recent Felidce above 

 mentioned. 



The head of the tibia is about the size of that of a rather small adult 

 Uncia concolor from Texas in my collection, and does not differ from it 

 materially in characters. The anterior external tuberosity is not prominent, 

 resembling that of Felis domestica rather than that of the larger cats. The 

 external cnemial, and the popliteal fossae are more deeply excavated than 

 in any of the five FelidcB above mentioned, and the external posterior angle 

 is acute. The distal extremity strongly resembles the corresponding part 

 in the recent species of Felidce, the external astragaline fossa being a little 

 more expanded outwards. There is but one groove for the tendon of the 

 peronaeus muscle instead of the two which are more or less distinct in all 

 the species named ; and its anterior bounding crest extends to the distal 

 border of the malleolus, as in Uncia concolor, and does not cease above it, 

 as in the other Felidce above mentioned, and as in Canis lupus. The per- 

 oneal ridge is well marked. 



The astragalus differs from that of all the Carnivora mentioned in this 

 article in the shortness of its neck and the extension of the internal trochlear 

 crest to the border of the navicular surface, from which only a narrow groove 

 separates it. The trochlear face is a little narrower than in the species of 

 Felidce and Hycenidce cited, and the inner side is more oblique outwards and 

 downwards than in any of the species cited, excepting the Uncia concolor. 

 On this side there is a well-marked tuberosity on the inferior margin poste- 

 rior to the middle. Above and anterior to it the astragalus is concave. 

 The navicular bone must have an extensive proximal external production, 

 judging from the extent of the recurved external part of its facet on the 

 astragalus. The trochlear groove of the astragalus is distinct, but is less 

 profound than in the recent Felidce and Hycenidce. The first metatarsus is 

 61 c 



