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Show 604 MR. F. E. BEDDARD ON THE [May 29, die sich bei Varanus als unmittelbare Forsetzung der V. ischiadica prasentirt." The accompanying figure given by Hochstetter* shows this point clearly, the vein in question merely giving off a branch in passing to the afferent renal behind the kidney. In Lacerta, &c., on the other hand, it is rather that the ischiadic vein joins the afferent renal and gives off the anterior abdominal as a branch before doing so, and that this junction takes place at or near the middle of the kidney. Iguana f and some other lizards agree with Lacerta in these points; but hitherto Varanus has stood alone among the Lacertilia, though showing resemblances, in the arrangement of the vein under discussion, to the Crocodiles. Text-fig. 100. Origin of anterior abdominal vein in Heloderma suspectum. Ant.Abd. Two roots of anterior abdominal vein; K . Kidneys; B.a. Renal afferent veins; O. Fat-body artery (this and others, i.e. femoral and sciatic arteries, indicated in black). In Heloderma, however, there is a distinct likeness to the Varanidee which cannot be overlooked. In the accompanying illustration the roots of the anterior abdominal are shown upon both sides of the body (text-fig. 100), and it will be observed that * Loc. cit. Taf. xvi. fig. 17. f Beddard, P. Z. S. 1904, vol. i. p. 442. |