552 ME» a. A. BouLBSGEa ON tiWLE-KNOwN [May 5, 



teeth. The toes are not so strongly fringed in the male, and the 

 fore limbs are more robust. 



The skeleton of Pelodytes punctatus is very peculiar. It was 

 desirable to ascertain whether the new species conforms in this 

 respect to the systematic position assigned to it. Tet it would 

 have been a pity to damage in any way an unique specimen. 



Skeleton of Pelodytes caucasicus, from a Bciagraph, upper and lower view. 



Thanks to the Eontgen rays, the difficulty was overcome, and I 

 have much pleasure in introducing what I believe to be the first 

 practical application to herpetology of this startling discovery. _ I 

 wish to thank Mr. J. William GifEord, who, through the mediation 

 of my friend Prof. Stewart, kindly undertook to photograph the 

 specimen, and to whom I am indebted for the sciagraph from 

 which these figures are drawn. 



