1904.] 



AX ATOMY OF THE LACERTILIA. 



443 



gives off a very slender twig, which appears to enter the vena 

 cava and then plunges into the parietes to the right of the middle 

 line. The posterior branch runs over the kidney and becomes 

 continuous with the vena renalis advehens, which enters the 

 kidney at about the middle of its length. The last vein leaving 

 the oviduct is, as I believe — though I am unable to be quite 

 certain — continuous with the caudal affluent of the kidney. 



Suprarenal Portal veins. — These vessels are more complicated 

 in Iguana than they are in Tiliqua or, according to Hochstetter's 

 figure, in Lacerta viridis. There are two series of these veins, 

 distinguished by their greater or less length. One specimen 

 possessed five of the longer vessels and three of the shorter 

 on each side-. The shorter ones cori-espond to the siipi'arenal 



Text-fiy-. 92. 



Ovarinn and suprarenal veins of Iguana tuberculata. 



0(Z., oviducal veins; Oc, ovary; Oi'.t'., ovarian vein of opposite ovary 

 Siw., shorter, Sr.v.', longer suprarenal veins; Vci., vena cava. 



portals present in Tiliqua ; and, as in that lizard, they arise from 

 the body- wall not far from the ventral median line. Of the longer 

 vessels, which emerge fi-om the body- wall much further away from 

 the ventral median line, there were five in one specimen, of which 

 three, on the left side of the body, united before reaching the 

 suprarenal body. Some at least of these longer vessels are con- 

 nected, as already mentioned, with the posterior vertebral vein. 

 In the other specimen of Iguana thei'e was an interesting modifi- 

 cation of this arrangement. The last three vessels of the longer 

 series, at any rate on one side of the body, instead of passing to 



