126 



ME. r. E. BEDDARD OK THE 



[Feb. 19, 



canal of course differs widely in actual lengths in different indivi- 

 duals ; but I think that so large a difference as this would he 

 unusual, and may be perhaps looked upon as a valid mark of specific 

 distinction. The second point respecting the alimentary canal 

 concerns the mesenteries which support the cseeum. In most 

 Lemurs, the caecum is tied to the small intestine by a single 

 anangious fold lying between two bloodvessel-bearing folds, Avhich 

 run on to the large intestine. In Hapahmiir griseus 1 found that 

 the median anangious fold was absent. The two lateral folds 

 were quite normal and like those of other Lemuroids. I suggested 

 that the absence of this frenum might conceivably be connected' 

 with the shortened cxcam oi Ha palemur. It is clear that this 

 explanation must fall to the gfound, since in E. simus the caecum 

 is of quite the same form, but it does possess the median anangious 

 csecal frenum. 



The liver of //. simtis is shown in the accompanying drawing 

 (text-fig. 22, p. 125), which does not altogether agree with the figure 

 given by Milne-Edwards, and may be compared with the annexed 

 sketch of that of H. griseus (text-fig. 23), which was published in 

 illustration of my notes upon the anatomy of that Lemur. It will 

 be seen that there are a few small points of difference. 



Liver of Hwpaleniur griseus. 



(From P. Z. S. 1884, p. 396.) 



g. umbilical fissure. Other letters as in text-fig. 22 (p. 125). 



The most salient difference is that the left lateral lobe, instead 

 of being quite small, no larger than the remaining chief lobes of 

 the organ, is quite twice the size of the left central. The right 

 central lobe, moreover, is rather larger than the left central. The 

 gall-bladder has the same anomalous position that it has in 

 H. griseus, and in many if not most other Lemurs ; the ductus 



