OCR Text |
Show 1 1 4 MR. F. E. BEPDAItD OX THE [May 17, The anterior abdominal vein is double, but the right vein is very considerably larger than the left, especially posteriorly. The two join far forward in the immediate neighbourhood of ^ the pancreas. They are here more nearly equisized. Posteriorly there is another and the only other j unction between these paired veins not far in front of the trifurcation of the caudal vein. After this point the left anterior abdominal vein receives a branch from the body-wall and ceases. It is not directly connected, as already mentioned, with the caudal vein. Just after its origin from the caudal vein the anterior abdominal gives rise to the single median epigastric vein, which runs forward at least as far as the liver, to which it gives off several branches. § Veins of the Posterior Abdominal Region in Eryx. It is remarkable that differences occur in these veins between the two species Eryx jaculus and E. conicus, if, that is to say, Text-fig. 21. a, b, c, parietal veins; Ant.Abd., anterior abdominal; Ep., epigastric; L.aff.r., left afferent renal; M.aff.r., right afferent renal. the single example of E . jaculus which I have examined represents the normal state of affairs. The veins in question in Eryx conicus |