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Show 1904.] ANATOMY OF THE LACERTILIA. 445 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 third important trunk from the small intestine follows, and the vein of the colon completes the series. Text-fig. 93. Sri/ Vena cava and spermatic veins of Tiliqua scincoides. L.Vci., left vena cava or vena renalis revehens; B.Vci., right ditto; Sp.L., sperm-duct; Sr. V., suprarenal 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 anteriorly, 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 epigastrics 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 prolongation of the light liver-lobe; where the vein enters it is quite as thick as the vena cava posterior. It runs forward along the right side of the vertebral column, and after giving off about four intercostal branches, two to right and to left, disappears from view. There is no communication with the oesophagus such as exists in Iguana. It agrees very closely with the corresponding vein in Varanus. |