1904.] 



AXATOMY OF THE LAOERTILIA. 



439 



have seen this vessel throughout its whole course only on the right 

 side of one specimen. In this specimen the vein bifurcates at 

 about the middle of the liver, and the one branch joins the first 

 of the ventral hepato-parietals ; the other branch is prolonged 

 forwards and joins the brachial vein. 



Lateral Abdominal veins. — These veins in Iguana are short, and 

 perhaps this condition is to be correlated with the conspicuous 

 development of the lateral epigasti-ics *. Each spiings close to the 

 root of the antei-ior abdominal on either side in company with 

 two small parietal veins (text-fig. 88). I could trace them 

 forwards only as far as the level of the suprarenal bodies, where 

 they become continuous with the veins of the same. 



Azygos vein. — Anteriorly the azygos vein is exposed on the 

 left side for a space of three or four vei'tebrse. I ti-aced it 

 beneath the subclavian artery and as far as the third following 

 intercostal artery. On the right side the vein disappeared from 

 view at the level of the origin of the right subclavian. Two 

 specimens were alike. 



" The gastro-intestinal branches of the Portal vein are either four 

 or five and they are us follows : — Posterior to the opening of the 



Text-fi 



/fn^JU 6^: 



Alimentary portal sj-stem of Iguana tuherculata. 



Ant.Ahd., anterior abdominal vein ; G., gastric veins ; G.Hep., gustro-hopatic ; 

 Li., trunk from large intestine; Si., branches from small intestine; S^pl., 

 splenic vein ; P., pancreatic vein. 



anterior abdominal vein is a branch supplying the stomach and pan- 

 creas ; this follows the curvature of the stomach, and is connected 

 anteriorly with the last of the gastro-hepatic veins. Then follows 

 another gastric vein which draws blood from the opposite side of 

 the stomach ; in the second individual this vein joins the first 



* According to Hochstetter this vein is absent in TJromastix. 



