LEONTINIA 113 



it proper to associate these fore limb bones with these skulls. 

 The humerus is a stout bone, of medium length, with a 

 large sessile, and but little rounded head. The external 

 tuberosity is wide, thick and projects a little above the 

 head, while the internal tul>erosity is so small as to be 

 almost negligible. The shaft is flattened laterally at the 

 upper end, but distally is compressed in the antero-pos- 

 terior direction. The supratrochlear fossa is shallow, the 

 anconeal deep, but there is no foramen connecting them. 

 The external condyle is small, the internal much larger. 

 The trochlea is narrow, with a swollen articular area for 

 the radius, and a wider saddle-like one for the ulna. The 

 ulna is a stout, nearly straight bone, slightly longer than 

 the humerus. The olecranon process, though large, is not 

 excessive. The sigmoid notch makes a deep semicircular 

 cavity, with the articular facets expanding on either side. 

 It was closely fitted to the radius so as to allow little or no 

 rotary motion of the forearm. The facet for the radius is 

 a narrow band-like area just below the sigmoid notch. The 

 shaft is almost rectangular in section. Distally the ulna 

 contracts sharply into a heavy styloid process, on the end 

 of which is a large convex facet for the pyramidal, which 

 merges without interruption into the facet for the pisiform. 

 The radius is a slenderer bone, with a relatively small prox- 

 imal head, but distally expanded into a much larger articu- 

 lar end. My specimen is considerably weathered, but 

 shows a wide shallow articular facet for the humerus, and 

 a band-like facet for the ulna, but otherwise it gives little 

 more than the length. 



Of the hind limb, Gaudry* figures the astragulus and 

 the calcaneum, the former short and with a low trochlea, 

 the latter also short and with a broad facet for the fibula. 

 Gaudry also states that the foot was tridactyle and planti- 

 grade, but I am doubtful of the plantigrade feature. 



* Anales Palaeontologie, 1906, t. 1, p. 28. 

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