ON THERIODONT HUMERI FROM THE UPPER PERMIAN 

 COPPER BEARING SANDSTONES OF KARGALINSK NEAR 



ORENBURG. 



-, W. Л. Twelvetrees. 

 F. L. S., F. G. S. 



In a previous communication to the Society I descri- 

 bed part of a labyrinthodont skull from the upper Per- 

 mian cupriferous sandstones of Kargalinsk near Oren- 

 burg. I now propose inviting attention to reptilian hu- 

 meri from the same locality, and indeed from the same 

 mine and the same floor of ore. As before, I am indeb- 

 ted to Mr. Rickard for the opportunity of studying the- 

 se specimens. 



Prof. Owen's order of reptiles, to which he has given 

 the name of «Theriodontia», has among other characters 

 the following one: «humerus with an entepicondylar fo- 

 ramen». *) The channel thus formed protects an artery 

 and nerve during muscular action and indicates a po- 

 werful- limbed animal. Such a character was considered 



•=) Quart. Journ. Geolog. Soc. May 1876, p. 99. 



