1907.] 



OF CERTAIN SPECIES OF SQUAMATA. 



65 



certain differences among themselves in the position of the 

 duodenum with reference to the pancreas. In V. niloticus the 

 pancreas is separated by a considerable tract of mesentery from 

 the duodenum, which results in the exposure of a long pancreatic 

 duct. The same is the case with F. ocellatus. On the other hand, 

 in V. griseus and V. exanthematicus the end of the pancreas 

 touches the duodenum close to the point of entrance of the 

 pancreatic and bile ducts, and there is therefore no great length of 

 pancreatic duct. 



Text-fig. 18. 



-P.O.. 



Lungs of Yaranus exanthematicus. 



Bronchi opened to show exit of " eparterial bronchi " close to puhnonary 

 artery (P.a.). 



In his figures of the lung of several species of Varanus, Milani 

 has pointed out certain diflferences which distinguish them. Thus 

 the lungs of V. bengalensis are lobed externally in a fashion which 

 is not to be found in the other species which are described. In 

 examining, for the purposes of the present communication, the 

 lungs of several species of Varanus, I have observed two small 

 points of difference between the lungs of certain species which are 

 not referred to by Milani. Of these both involve an asymmetry 



Proc. Zool. Soc— 1907, No. Y. 5 



