346 VERTEBRATE ZOOLOGY 



Section A. Unguiculata 



Order 1. Insectivora. 



" 2. Dermoptera. 



" 3. Chiroptera. 



" 4. Carnivora. 



" 5. Rodentia. 



" 6. Edentata (Xenarthra). 



" 7. Pholidota. 



" 8. Tubulidentata. 



Section B. Primates 



Order 9. Primates. 



Sub-Order 1. Lemuroidea. 

 " 2. Anthropoidea.. 



Section C. Ungulata 



Order 10. Artiodactyla. 

 " 11. Perissodactyla. 

 " 12. Proboscidia. 

 " 13. Sirenia. 

 " 14. Hyracoidea. 



Section D. Cetacea 



Order 15. Odontoceti. 

 " 16. Mystacoceti. 



This classification, which follows closely that given by Osbom in 

 "The Age of Mammals," departs widely from traditional lines. The 

 grouping of five orders into the section Ungulata is decidedly novel; 

 the separation of the Proboscidia from the Perissidactyla, and the 

 inclusion of the Sirenia among the ungulates, are well founded; 

 the distribution of the old group of Edentata among several distinct 

 orders will doubtless meet with general approval, for it has long been 

 felt that the old assemblage was artificial. But perhaps the most 

 striking feature of the classification is the position assigned to the Pri- 

 mates — ^below the ungulates and the cetaceans instead of at the apex 

 of the phyletic series where we have been accustomed to place them. 

 This somewhat lowly position of the Primates is justified by the fact 



