1905. ] VASCULAR SYSTEM OF LACERTILIA. 479 
which runs along the trachea parallel with a tracheal artery 
referred to. This vein does not exist on the opposite side. 
(2) The azygos vein is developed on the left side of the 
body only. 
(3) There is an unusual series of vestiges of the posterior 
cardinals, which, like the anterior vestige of the same, the azygos, 
are upon the left side of the body, and, with the exception of a 
small twig, not upon the right side. The veins form the dorsal 
parieto-hepatics, and pour their contents into a common trunk 
which runs below the liver only in its anterior region, and which 
receives also branches from the first half of the stomach. 
(4) The anterior abdominal vein receives the portal just before 
its entrance into the liver, along which it is not prolonged, and 
just after the entrance of the portal the posterior part of the 
epigastric vein. The anterior region of the epigastric vein is 
either separate from the posterior part or joined by the minutest 
twig; it pours its blood into the liver near to its anterior end. 
(5) There are gastro-hepatic vessels to the number of four or 
five in the anterior region of the stomach and liver only. The blood 
from the posterior region of the stomach is chiefly collected into 
a vessel which runs back along the stomach and joins the com- 
bined portal and anterior abdominal. 
(6) The supra-renal portal system consists of two series of 
vessels, of which one series, consisting of one or more twigs, arises 
from the parietes laterally ; the other series, consisting of one 
vessel only, arises from the parietes close to the dorsal middle line. 
Veins also emerge from the parietes and run to the sperm-duct. 
(7) The kidneys receive blood from the parietes in their neigh- 
bourhoed by a series of about six veins to each kidney arranged 
metamerically, and corresponding in point of emergence from the 
parietes with the more laterally placed supra-renal portals. 
The two halves of the anterior abdominal, before they join, 
also give off two twigs to the kidney on each side 
(8) A lateral abdominal vein is present, which runs along the 
kidney on the outer side, but dies away before reaching its 
anterior end. 
(4) On the Anatomy of Amphisbena brasiliana, particularly of the 
Vascular System and the Mesenteries. 
Though a good deal of information concerning the anatomy of 
this genus of Lacertilia is already contained in zoological litera- 
ture *, there remain certain matters which have not been ex- 
haustively studied, either in the species (Amphisbena brasiliana) 
with which I deal in the communication now submitted to the 
Society or in other species. I have therefore, in continuation of 
a series of dissections of the Lacertilia, some of the results of which 
* The principal anatomical memoirs dealing with the viscera are by v. Bedriaga 
(Arch. f. Naturg. 1884), Smalian (Zeitschr. wiss. Zool. 1885), and Butler (P.Z.S 
1895). In none of these is A. brasiliana dealt with. 
