1905. | VASCULAR SYSTEM OF LACERTILIA. 481 
of the stomach, to which it is attached. This disposition is possibly 
due to the absence of a left lung and its accompanying pulmo- 
hepatic ligament, which in forms where it does occur comes into 
relation with the right hepato-gastric ligament. At a distance 
of rather more than 40 mm. from the anterior end of the liver 
the two dorsal hepatic ligaments unite to form a single membrane, 
which extends forward for the remainder of the course of the 
liver. It is at least common, if not the rule, among the Lacer- 
tilia, for these two membranes to unite anteriorly. So that the 
conditions obtaining in Amphisbena are merely an exaggeration 
of those to be seen elsewhere, and due to the elongation of the 
liver. I shall recur to this anatomical relationship of the mem- 
branes in considering the blood-vessels which run in them. 
Text-fig. 66, 
Membranes uniting vena cava and left lung in Aimphisbena brasiliana. 
a. Umbilical ligament ; 6. Pulmo-hepatic ligament ; Za. Lung; v.c. Vena cava. 
The liver is also attached to adjacent viscera by a lateral 
mesentery upon the left side of the body, and uniting the liver with 
