472 MR. F. E, BEDDARD ON THE [ Nov. 28, 
noticed that all three of the important gastro-intestinal arteries 
in this Lizard arise from the aorta at the same plane exactly. 
One is not more to the right or left of the median ventral line of 
the aorta than the others. The hepatic artery accompanies the 
conjoined abdominal and portal veins in entering the liver. That 
organ is also supplied by several small branches (see text-fig. 64, 
p. 475), which naturally owe their blood to the anterior gastric 
arteries already mentioned, inasmuch as they accompany the 
gastric veins, which, as is stated below, pour their contents into 
the anterior region of the liver. I did not detect any further 
arterial blood-supply of the liver than from the two sources 
referred to. 
Renal Arteries —These arteries (text-fig. 63, p. 473) are very 
numerous and show a great regularity, not only in their mode of 
origin, but in their segmental relations. I counted six separate 
renal arteries on the right side and seven on the left; and in 
addition to these the iliac trunks, which also give off the epigastric 
arteries, send a branch to the kidneys posteriorly. The renal 
arteries are accurately paired, save that one artery is missing on 
the right side. That they are otherwise accurately paired is 
connected with the fact that they all arise in common with the 
intercostal arteries. Each artery runs over the kidney for some 
distance before opening into it rather laterally and of course 
dorsally. 
Anterior Abdominal Vein.—This vein is typically Lacertilian in 
origin and distribution. There are nevertheless two or three 
facts concerning its branches to which it will be necessary to call 
attention. 
The vein arises as usual by two roots from the caudal vein. 
On each side before they unite into the single vein each half gives 
off two small veins side by side to the posterior part of the kidney 
posterior in position to the parieto-renal afferent veins mentioned 
below. After the origin of these a larger vein is given off 
which runs along the body-wall dorso-ventrally and on the outer 
side of the kidney. This vein dies away anteriorly before the 
anterior end of the kidney. It is, as I think, the lateral abdominal 
vein of other Lacertilia. The anterior abdominal vein runs along 
the mid-ventral line of the body and is supported by a fold of 
eritoneum, the continuation backwards of the falciform ligament, 
and thus the equivalent of the primitive ventral mesentery. The 
vein joins the portal before entering the liver close to the gall- 
bladder. 
Hepatic Portal System.—The intestinal portal vein posteriorly 
frees itself from the large intestine, along which it runs in close 
apposition, at the junction of the small and large intestines. 
Henceforth it lies at some distance from the intestine in the 
mesentery. It is noteworthy that this main portal trunk les on 
the left side of the dorsal mesentery, so that it lies superficially 
to the arteries when this mesentery is viewed from the left side. 
The vein, moreover, contrasts with the arteries over which it runs 
