Williston — Dinosaurian Genus Oreosaurus, Mars A. 113 



The striking distinction from AMosaurus, at once seen, and 

 clearly of generic value, is presented by the remarkably elon- 

 gated and slender scapula. Its shape also is distinctively dif- 

 ferent in the proximal portion. The other bones preserved do 

 not seem to differ very much from the corresponding bones of 



Allosaurus. The humerus appears to be somewhat more 

 curved, the radius is stouter, and the hand is probably larger, 

 relatively. This bird-like form of the scapulse is a feature 

 apparently unique among dinosaurs. Its shaft is of nearly 

 equal width throughout or but slightly widened distally. 



Am. Jour. Sci.— Fourth Series, Yol. XI, No. 62.— February, 1901. 

 8 



The 



