694 S. W. WILLIS TON 



Length of scapula ------- 444 



Least width, a Uttle above acromion process - - - 63 



Greatest width - - - - - - - 213 



Thickness of glenoid articulation 55 



Height of ilium -._-_.- 5^0 

 Diameters of glenoid fossa ----- 140, 160 



Expanse of ischio-pubis ------ ^20 



Length of pubis from rim of acetabulum - - - 14^ 



Length of ischium from rim of acetabulum - - 200 



Width of blade of ilium - - - - - - 170 



The specimen above described was found protruding from a face 

 of the cHff near the uppermost part of the Popo Agie beds, in the 

 vicinity of the Little Popo Agie River, by Mr. Roy Moodie and the 

 writer. The specimen was partly worked out by myself, and later 

 by Mr. Branson and Mr. Moodie. The great difhculties under 

 which the specimen was secured prevented at the time exploration 

 for other bones. There can be little doubt but that other parts of 

 the skeleton, perhaps the larger portion, still remain in the rocks, 

 and, it is hoped, will be secured another season. 



What the relations of Euhrachiosaurus are with other reptiles it is 

 yet impossible to say with much degree of certainty. I do not believe 

 that the genus belongs with the Pareiasauria, chiefly because of the 

 presence of an entepicondylar foramen, though the humerus resem- 

 bles that of Pareiasaurus somewhat. The humerus recalls that of 

 Platypodosaurus, but, upon the whole, I believe that the animal will 

 be found to be nearest related to Tapinocephalus or Phocosaurus, 

 from the Karoo beds of South Africa. The ilium is incompletely 

 known in these genera, but the size of the acetabulum, the shape 

 and structure of the ischio-pubis, the posterior projection of the ilium 

 and the limited sacral attachment, all point to that genus. At all 

 events, I believe that the genus, as also Placerias Lucas, and the 

 following, belong among the true Anomodontia. From Placerias 

 Lucas, ^ from the Trias of Arizona, this form differs very evidently in 

 the great expansion of the lower end, the ectepicondyle, which is 

 figured in Placerias as convex and thick, being widely expanded. 



Brachyhrachium brevipes, gen. et sp. nov. 

 A single humerus, though incomplete, found near the upper part 

 of the Popo Agie beds, and in almost identically the same horizon as 



I Proceedings of the U. S. National Museum, 1904, p. 194. 



