294 THK WASATCH AM» lilUDGEK FATTN.E. 



The external di.stal niaig-inal crest is thin, and is continued well up on the 

 shaft. The external part of the condyle displays no intertrochlear ridge. 

 Olecranar and coronoid fossae well marked. The olecranon is robust and 

 deep, and is truncate posteriorly and below. The head of the radius is a 

 regular transverse stout oval. 



A fragment of the ilium from near the acetabulum displays a promi- 

 nent "anterior inferior spine." The best preserved tarsus includes calca- 

 neum, astragalus, cuboid, and navicular bones. The tibial face of the 

 astragalus is strongly convex anteroposteriorly and slightly concave trans- 

 versely. The head is prolonged some distance beyond the distal extremity 

 of the calcaneum, and presents a convex internal border and a concave 

 external one. Its long axis is parallel to that of the tibial portion, but is not 

 in the same axis, owing to its lateral position. The external face of the 

 trochlear portion is vertical, and is interrupted by a deep fossa behind. 

 The internal face is very oblique, and passes into the superior face of the 

 head. The posterior face of the trochlea is grooved with a wide and shal- 

 low groove, which just reaches the superior face, terminating on the exter- 

 nal side. The superior face is not grooved, but is shallowly concave in 

 transverse section. The head is a transverse oval, and is convex ; it has 

 a small facet for the cuboid on the outer side. 



The heel of the calcaneum is large and expands distally, so as to be as 

 wide as deep. The convex astragalar facet is very oblique to the long 

 axis of the calcaneum ; the sustentaculum is rather small. Below the latter 

 is a narrow tuberosity looking downwards and forwards. On the external 

 side, close to the cuboid facet, is a depressed crest. The cuboid facet is as 

 deep as wide. The cuboid bone is a little longer than wide proximally, 

 and narrows distally. It has a narrow astragaline facet and a deep fossa 

 below proximally. The hook inclosing the groove for the tendon of the 

 flexor muscle is prominent. The navicular is rather small, and has three 

 inferior facets, which diminish in size outwards. It has a strong posterior 

 knob-like process, with a narrow neck. 



When the t^irsal bones are in position, and the tibia stands vertically 

 on the astragalus, the cuboid bone is turned inferiorly. This indicates that 

 this species walked on the outer edge of the hinder foot 



