92 



THE GENERAL ANATOMY OF THE LEMUROIDEA [SECT. A 



quite comparable with the corresponding part in certain artio- 

 dactyle Ungulata. Whatever the determining factor may prove 

 to be, and it is at present obscure, the condition is certainly not a 

 primitive one ; on the contrary, it probably indicates specialization 

 in regard to diet. 



The elongated rectum presents no features of particular im- 

 portance. 



Liver... 



Caec 



Appendix 



Fig. 49. Fig. 50. 



Fig. 49. Sketch of the viscera of Lemur mongoz. (Mus. Anat. Cant.) 

 Fig. 50. Projection drawing of the same. D. Duodenum. 



The Spleen is an elongated crescentic organ fitted round the 

 lateral convex margin of the left kidney. In form, the spleen is 

 said to resemble those of quadrupeds rather than those of the 

 higher apes. 



K. Urogenital System. The kidneys are placed asymmetri- 

 cally, that on the left side being more caudal (distal) in position 

 than that on the right side of the abdomen. Thus the relation is 



