352 



ON THE REPRODUCED TAIL OF LIZARDS. [June 5, 



A very striking example of reversion is exhibited by 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. 



m 





m 



i 



-'r^. 



■<X:0 



Tails of (A) Gymnophthalmus qiiadrilineatus and (B) Ophisaunts 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 



