ON A LABXRINTHODONT SKULL (PLATXOPS RICKARDI, 



Tîoelvetr.) FROM THE UPPER PERWIAN CUPRIFEROUS 



STRATA OF KARGALINSK NEAR ORENBURG. 



By 



W. H. Twelvetrees, 



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



1 beg to submit to the Society a few observations 

 upon part of a Labyrinthodont skull found in the upper 

 Permian sandstones of Kargalinsk near Orenburg. My 

 first remarks will be devoted to its geological position, 

 after which 1 shall proceed to describe the fossil itself. 



Locality. 



The skull was discovered in the ore bed of Roshdest- 

 vensk copper mine about 40 miles N of Orenburg and 

 was placed in my hands for description by Mr. Thos. 

 Rickard, the Superintendent of the property, my obliga- 

 tion to whom 1 take this opportunity of acknowledging. 

 I was shown by him the exact bed from which it was 

 derived. The bed is a hard cupriferous sandstone, capped 

 by non-cupriferous sand rock and lying upon red clay 



