230 ZOOTOMY. 



which are embedded in cavities furnished by the pelvis and 

 sacrum. 



215. The postcaval vein (vena cava inferior s. 

 posterior,) (Fig. 54,/fc), a large vessel passing from between 

 the anterior ends of the kidneys to the posterior dorsal 

 region of the right lobe of the liver : it enters the substance 



ur 



T.od 



l.od" 



l.od/ 



FIG. 53. Columba livia. The urinogenital organs of an adult 

 female, ventral aspect ( x f ). 



The peritoneum is removed, but the parts are in situ, except that the 

 left oviduct is partly uncoiled. 



cl.2, middle, and cl.^, posterior, compartment of cloaca : /', kidney ; 

 Lod^ left oviduct: l.od', its opening into cloaca: Lod", its funnel-like 

 anterior end : l.od'", its opening into crelorne : ov, ovary ; r.od, rudi- 

 mentary right oviduct : r.od', its opening into cloaca : ur, ureter : ur', 

 its opening into cloaca. 



of that gland, and, emerging from its anterior border, passes 

 forwards to the heart ( 246) : it is formed posteriorly by the 

 union of the two iliac veins ( 218), which carry the 



