100 



MR. F. E. BEDDARD ON THE VISCERAL 



[Feb. 7, 



On the other hand a large number of Lacertilia agree, in the 

 structural features that have been referred to, with Iguana. 



I have had the opportunity of examining the following genera and 

 species : — 



Lacerta. 



Uromastlx hardwickii. 



Uromastix spinipes^. 



Teius teyuexin. 



Cyclodus gigas. 



Iguana tuberculata. 



Cyclura nubila. 



Plestiodon aurafus. 



Trachydosaurus rugosus. 



In all of these there is a general agreement with Iguana ; the 



Diagrammatic section through body of Lacerta. 



L, Liver ; I, intestines ; parietal layer of peritoneum and umbilical ligament 

 indicated by a dotted line. 



horizontal membrane is absent for the greater part ; when the fat- 

 body is present it lies in the hinder region of the abdomen, from 

 which, however, it is cut off by a membrane ; this presumably 

 represents the posterior region of the horizontal membrane in 

 Varanus and Monitor. Other than this there is no trace of the 

 horizontal septum in any of the Lizards whose names are given in 

 the second list. 



In Lacerta, Cyclura, Uromastix, and Teius the umbilical ligament 

 is present with the same relations as in Iguana ; it only varies in the 

 greater or less extent of its attachment to the ventral median line. 



