Il8 



MR. F. E. BEDDARD ON THE 



[May 17, 



structure. The discovery of this prerenal portion of the posterior 

 cardinal in an Ophidian removes another point of dissimilarity 

 between the Ophidia and the Lacertilia. 



Text-fig. 23. 



Liver and certain adjacent veins in ^ryx conicus. 



Ao., aorta; oes., oesophageal branches of longitudinally running left posterior 

 cardinal; Int., intercostal branches of the same; L, liver; P.^j., portal vein; 

 St., branches to stomach. 



The Azygos vein is admittedly a vestige of the posterior cardinal 



