34 

 Measurements of Pelvis. 



M. 



Ilium, transverse diameter above acetabulum -062 



Ilium, long diameter (estimated) 232 



Acetabulum, greatest diameter -050 



Ischium, transverse diameter below acetabulum '041 



Pubis, diameter at obturator foramen -035 



The tarsus is arranged in the usual Perissodactyle order. 

 The calcaneum is stout, of good length, tuberous, but not 

 expanding much at the extremity ; presenting two faces for 

 the astragalus, of which the internal is the largest, and a 

 large distal face for the cuboid. The astragalus is wide, with 

 less asymmetry in the two articular facets than is common. 

 It articulates with both the cuboid and navicular. 



Measurements of Tarsus. 



M. 



Astragalus, total width, tibial facets -048 



Astragalus, total length 056 



Astragalus, length, navicular facet -046 



Astragalus, width, navicular facet -035 



Calcaneum, total length -120 



Calcaneum, total breadth -057 



Calcaneum, length of tuber calcis -050 



All the above were found at Henry's Fork Divide. In 

 another locality, in connection with a fine head of P. major, 

 was found the lower half of a humerus. 



The shaft is cylindrical and twisted, expanding widely at 

 the distal end. Of the two condyles the external is the 

 largest ; and, to quote from Dr. Leidy, " a deep supracon- 

 dylar fossa occupies the front of the humerus, opposed by a 

 deeper and more capacious anconeal fossa." The greatest 

 breadth between the supracondyloid eminences is -091 m. 



PAL^OSYOPS PALUDOSUS, Leidy. 



Cont. to Ext. Vert. Faun, P. Icevidens Cope. U. S. Geol. Survey of Terrs, 1872, 



P- 59i- 



Specific characters. Second superior molar has but one 

 outer tubercle. The cones are low as compared with P. ma- 



