NEW REPTILES FROM THE UPPER TRIAS 695 



that of the preceding genus, shows such decided differences, and, 



moreover, is so characteristic, that I venture to describe and name it. 



The upper extremity is thin and narrow; probably some portion of this 



had been lost prior to fossihzation, but inasmuch as Broom describes 



this extremity in Udenodon as narrow, I beheve that little is missing. 



The thick and massive lateral process 



is directed upward. The inner condyle 



is rounded below, showing that nearly the 



whole length of the bone is present, 



though the outer condyle, that projecting 



from the face of the cliff, is wanting. i 



The large entepicondylar canal begins 



considerably above the lower angle of the 



lateral process, and not wholly below the 



process, as in Euhrachiosaurus. The 



bridge covering it is very stout. The 



median process is small, not protuberant /^''^' 



and flattened, as in the last genus. The ' 



outer border is concave from above down- -"^^.f*:.--''^- ■" 



ward, strongly convex transversely. At Fig. 5.— Left humerus 



the lower end of the part preserved the of BrachyhracMum brevipes. 



border becomes thinner, but it is not 



possible that there was any such supinator expansion as is shown in 



Euhrachiosaurus ; if any, it was situated much more distad. The 



condyles must have been remarkably broad, equal to much more than 



half the length of the bone, and the olecranal fossa is large and deep. 



The upper part of the palmar surface of the ulnar process is preserved, 



and is much more massive and prominent than in Euhrachiosaurus. 



If the radial prominence was relatively as large, it must have been 



very massive. 



The specimen was discovered by Mr. Roy Moodie, and removed 

 from the very hard sandstone by him and the writer. 



Length of the bone as preserved ----- 255 ™™ 



Width across lateral process - - - - - 197 



Estimated width of condyles ----- 200 



Least diameter of shaft in plane of condyles - - 70 



