ANATOMY OF THE LACERTILIA. 



445 



1904.] 



from the stomach and pancreas, which is followed by a small 

 duodenal. Then two important vessels debouch into the portal 

 vein opposite to each other, one from the small intestine, the 

 other from the spleen. A thii-d important tnuik from the small 

 intestine follows, and the vein of the colon completes the series. 



Text-fig. 93. 



CO. 



SrK 



Vena cava and spermatic veins of Tiliqiia sciucoides. 



L.Vci., left vena cava or vena renalis reveliens; B.Vci., riglit ditto ; 

 Sp.D., sperm-duct; Sr.V., suprai-enal veins; T., testes. 



Epigastric veins. — These are not so fully developed as in 

 Varanus, and are somewhat different in other respects. The 

 vessel enters the liver anterioily, as is the case with Iguana, and 

 receives a few branches from the ventral parietes. The intimate 

 relation of the epigastric to the anterior abdominal contrasts 

 with the conditions obtaining in Varanus. Furthermore, it will 

 be apparent that this vein is equivalent to a vein in Iguana which 

 is lettered Epig. in the sketch of the anterior abdominal system 

 of that lizard (text-fig. 88, p. 438), and that therefore it represents 

 only a portion of the epigastric system of Iguana. The paired 

 epigasti-ics of Iguana I have been unable to find in either specimen 

 of Tiliqua. 



Dorsal Hepato -parietal veins. — Only one vein, as is apparently 

 the general rule among Lizards, enters the narrow posterior pro- 

 longation of the right livei'-lobe ; where the vein enters it is quite 

 as thick as the vena cava posterior. It runs forward along the 

 light side of the vertebral column, and after giving off about four 

 intercostal branches, two to right and to left, disappeai's from 

 view. There is no communication with the ossophagus such as 

 exists in Iguana. It agrees very closely with the corresponding 

 vein in Varanus. 



