1896.] NATURAL SCIENCES OF PHILADELPHIA. 309 



and left lungs respectively, constituting the right hepatopulmo- 

 uary and gastropulmonary mesenteries (RHP. and GP.). A 

 sheet occasionally goes off from the gastrohepatic to the left body 

 wall, forming the left gastroparietal mesentery. This is frequently 

 represented by a narrow band, and occasionally, as in Dipsosaurus, 

 it joins the small intestine just beyond the extremity of the gastro- 

 hepatic sheet. This is not represented on the accompanying dia- 

 gram. In Heloderma a distinct sheet extends fi'om each border of 

 the liver to the body walls, forming the right and left lateral hepatic 

 mesenteries (LLH, RLH). In Chamceleon, Polychrus and Anolis, 

 the left lung besides being attached to the gastrohepatic mesentery, 

 is attached by a sheet to the left border of the liver, forming the 

 left hepatopulmonary mesentery, (LHP). 



Diagram of peritoneum of Sauria, with all the folds displayed by a 

 transverse section near the middle of the liver. L liver ; St. stomach : E.L 

 right lung; LL left lung; EG epigastric, peritoneal fold; LHV and RHV, 

 left and right hepatoventral folds ; RLH and LLH, right and left lateral 

 hepj^tic folds; KH, right hepatic; GH, gastrohepatic; LHP and RHP left 

 and right hepatopulmonary folds. 



In Varaiius salvator there is a short median gastrohepatic sheet 

 (GH). In Varanus, owing to the anterior position of the lungs, 

 they have no hepatic or gastric connections. In no Saurian have 

 I observed a right hepatopulmonary sheet, as the right hepatic 

 mesentery supports the right lung. The latter extends along the 

 apical strip of the right lobe of the liver to the genital mesentery in 

 many genera. In Tupinamhis, Dracoena, and some others, the right 

 hepatic extends as a strong sheet to the right body wall, forming 

 with an equally strong gastroparietal of the left side, a kind of dia- 



