1909. ] POSTCAVAL VEIN IN MAMMALS. 499 
on the right there were two of these veins of equal and con- 
siderable size. On the left only a single renal vein debouched 
into the postcava. As is usual (? universal) among Marsupials 
both renal veins give off an ovarian vein, in addition to that pair 
which flow directly into the postcaval. On the right side a single 
Text-fig. 132. 
Posteaval vein and its branches in Tvrichosurus vulpecula (A) and 
Trichosurus fuliginosus (B). 
i. Intercostal veins. K. Kidney. 7. Lumbar veins. +. Renal veins. 
sp. Spermatic or ovarian veins. 
vein opened into the lower of the two renal veins; at a little 
distance from its point of opening into the renal vein this ovarian 
vein divided into two. Of these the outer branch opened into 
the lumbar parietal some little distance away from the opening 
