TALIGEADA. 609 



las a vertical oval section, the inferior angle narrowed and subacute. It 

 is broken off. The superior point of the truncate anterior face looks as 

 though divided between two flat articular faces, perhaps for clavicles. Im- 

 mediately behind the lateral superior angles of the front are two small 

 deep fosssp, each perhaps for a first hsemapophysis. The position of the 

 bone is, however, uncertain. 



Measurements. 



M. 



-r.. , .. /. 4. ( vertical 016 



Dw-mietera ol front ; 



( transverse above Oaa 



T, , e , ..,<vertical 0105 



Diameters of shatt ; „„ , 



f transverse UUa 



The humerus is robust and of moderate length. The bicipital or deltoid 

 crest is very prominent, and becomes more so distally where it projects in a 

 narrow twisted tuberosity and then descends abruptly to the posterior side of 

 the shaft. There is a narrow oval strong muscular insertion on the poste- 

 rior edge of the inner side of the shaft proximad of the end of the deltoid 

 crest. From this point distad, the posterior face is flat. Three and one- 

 half centimeters distad the external edge expands into a laminar crest 

 which soon presents a straight edge, which terminates in the very obtuse 

 and short external epicondyle. Above the olecranar fossa the posterior 

 face is slightly concave So long as any trace of the deltoid crest remains, 

 the shaft has a triangular section. The internal epicondyle is very promi- 

 nent and is truncate. The bridge over the epicondylar foramen is well de- 

 veloped. The condyles are not as much extended transversely as in Perip- 

 tickus rJiabdodon, but is more so than in Phenacodus primcevus, and is a good 

 deal as in Coryphodon. The flange is moderately prominent, and the cylin- 

 der quite convex anteriorly, descending to the short internal extremity. 

 The angle between the two surfaces is posteriorly converted into a deep 

 narrow groove, which posteriorly separates the external condyle from a low 

 flanoe of the inner edge of the condyle. The latter is as usual concave 

 posteriorly in the transverse direction, and has strong lateral and posterior 

 outlines, which are formed like the boundaries of one side with two angles 

 of a parallelogram. Between the internal angle and the base of the epicon- 

 dyle is quite a fossa. 

 39 c 



