1905. ] OF THE YELLOW-THROATED LIZARD. 261 
prolonged right lobe of the liver and the gonad, both male and 
female, does not bear upon the question of the affinities of Gerrho- 
saurus. For among the Skinks these organs may be in contact or 
separated by a ligamentous interval. 
Muscular fibres in Mesenteries—As is the case with other 
Saurians, Gerrhosaurus has bands of unstriped muscle in several 
of the mesenteries. The most important of these is a bundle of 
muscular fibres which accompanies the anterior abdominal vein 
(text-fig. 835, m) and runs into the gastro-hepatic ligament. It 
is a thick bundle of fibres, but after traversing the gastro-hepatic 
ligament for about half its extent it fans out into a fine bundle, - 
the individual fibres of which hardly reach the stomach. This 
bundle is represented in many lizards. But the conditions 
observable in Gerrhosaurus throw no light upon the affinities of 
Text fig. 35. 
Gastro-hepatic ligament of Gerrhosauwrus flavigularis, showing course of 
muscular bundle. 
A, Gastro-hepatic ligament ; Ant.Abd. Anterior abdominal vein; Gt. Stomach ; 
LZ. Left lobe of liver; m. Muscular band. 
that lizard. For though it differs from the arrangement found 
in the Scincide, it shows no likeness to what is found in Lacerta 
ocellata. In KHumeces, Macroscineus, and Lacerta ocellata the 
bundle of fibres is continued without fanning out to the stomach, 
where it forms a close investment of that organ for the greater 
part of its extent in MZacroscincus. Inasmuch as both specimens 
of Gerrhosaurus were identical in the characters of this muscle, 
it may, I think, be assumed that its condition is typical of the 
species. 
Pancreas.—The pancreas of Gerrhosaurus (text-fig. 36, p. 262) 
differs from that of Lacerta ocellata in the comparative stoutness 
of the branch which goes tothe spleen. It is, in fact, like Leydig’s 
figure of the pancreas of Lacerta agilis, expanding when it reaches 
the spleen. The pancreas of Gerrhosawrus furthermore differs: 
from that of Lacerta (at any rate ocellata) in that there is a 
