u 



IMMUNITY IN HEALTH 



Fig. 19. 



C^CAL Apkx with Small I.umen. 



Hylobates Hoolock, the Hoolock Gibbon (after Huntington), 

 I. Ileum. 

 C. Ca^'cum. 

 A. Appendix. 



Fig. 20. 



C^CAL Apex avith Small Lumkn. 



Troglodytes Niger, the Chimpanzee (after Huntington). 

 I. Ileum. 

 C. Caecum. 

 A. Appendix. 



