172 



convex ridge, witlr a truncate discoidal articular extremity, which is nearly 

 separated from the head by a groove. Both extremities are moderately con- 

 vex. The Jlbula is similar to that of other species in its broad three-quarters 

 discoidal form. Both articular extremities are strongly convex, and are con- 

 tinued on the inner side on the thinned inner border. The external margin 

 is thickened and deeply concave, and without tuberosity. The iibia is a more 

 slender element, with subcylindric shaft and much expanded extremities. 

 The proximal is oval, and is continued as a narrow ridge on the inner side, 

 for contact with the corresponding ridge of fhe fibula. The distal extremity 

 is an equilateral spherical triangle, of which the inner angle is on a different 

 plane from the remainder. 



Fig. 7. — Sketch of the pelvic bones and luljaccnt vcitcbni; in tlio relative positions iu which (hoy- 

 wero founil on reinovin;^ the superinciiuibont rock; 1, ilia ; 2, puhes ; 3, iachia; 4, femur ; 5, posterior 

 lumbar vortobruj. Size much reduced. ' 



The phalanges are slender, witli cyliiidric shafts and ex])anded extremi- 

 ties, which support oval articular surfaces. Tlioso of the two extremities 

 appear to be similar. The distal ones are extremely small and Hat, willi 

 o\ itanded extremities. 



O'i do iihlftd hones may l)c mentioned two with Hat expanded distal extrem- 

 ity and thick proximal, bearing an oval articular surface, with an angulate 



