468 



MR. F. E. BBDDARD ON THE 



[Apr. 19, 



the median epigastric vein ; the cleft runs obliquely forward a 

 little further than the point where the reilexed falciform ligament 

 ends. The left lobe of the liver is furthermore marked by a 

 longitudinal furrow extending nearly as far forward as a, transverse 

 seam running across the liver. This seam supports a very short 

 and delicate membrane which does not reach the ventral parietes. 

 It is figured by Butler as running obliquely, which is not the case 

 in my specimen. Butler does not discuss the homology of this 

 membrane. It seems to me to be a vestige of the left half of the 

 double falciform ligament that occurs in Seps and Tiliqua. The 

 liver as a whole is considerably narrower than that of either 

 Iguana or Varanus. The prolongation along the vena cava of 

 the lateral lobe of the right liver perforates the " diaphragm." 

 The falciform ligament of the liver is single save for the rudi- 

 ment of the left ligament already referred to. Posteriorly it is 

 continuous with the posthepatic septum. Anteriorly it can be 

 seen (see text-fig. 97) to be continuous with a fold of membrane, 



Dissection of thoracic cavity of Tupinambis nigropunctatus, to show relations of 

 prehepatic and posthepatic septa. 



A, aorta ; a, prehepatic septum continuous with falciform or umhilical ligament ; 

 a, ventricle of heart ; L, left lung ; Liv, liver ; o?, oesophagus ; S, post- 

 hepatic septum ; Sc, subclavian artery of left side; 8t, stomach ; Z7, falciform 

 or umbilical ligament which has been cut longitudinally and the liver pushed 

 to the right. The thick black line represents the line of the ventral 

 parietes cut longitudinally to the right of the attachment of the umbilical 

 ligament ; TJ^, rudimentary left umbilical ligament ; V, median epigastric 



especially well developed on the left side of the body, which curves 

 upwards and reaches the middle dorsal line of the parietes. This 

 lies well behind the heart and at the level of about the middle of 

 the lung. In its course it curves backwards both doi-sally and 

 ventrally, and its line of attachment to the parietes is therefore 

 convex anteriorly. 



