352 



ON THE REPRODUCED TAIL OF LIZARDS. [June 5, 



A very striking example of reversion is exhibited bj"^ the Teioid 

 genus Gymnophthalmus. It is necessary first to say that this genus, 

 though agreeing with the Chalcidine Teiidse in general structure, 

 presents the scaling, and a most deceptive appearance, of a Scincoid, 

 and has therefore been placed in the latter group, to which it 



A. 



,y] 



B. 



u 



m 





\/^- 



Tails of (A) GymnopMhahmis qimdrilineatus and (B) Ojjkisaurus gracilis, 

 with reproduced terminal portion. 



bears, however, not the slightest affinity. Now, the character of 

 the reproduced tail, with which I was not acquainted when I 

 arrived at my conclusions respecting the affinities of this genus 



