CHAP. V.] 



CLASSIFICATION. 



85 



names are given wherever they exist, in order that readers pos- 

 sessing no technical knowledge, may form some conception of 

 the meaning of the term " family " in zoology. 



The primary divisions of the animal kingdom according to 

 two eminent modern authorities are as follows : 



Huxley. 

 Classification of Animals (1S69). 



1. Protozoa 



2. Infusoria 



3. Ccelenterata 



4. Annuloida 



5. Annulosa 



6. Molluscoida 



7. Mollufeca 



8. Vertebrata 



Carus and Gerstaeker. 

 Handbuch der Zoologie (1868). 



1. Protozoa. 



2. Coelenterata. 



3. Echinoderrnata. 

 ( 4. Vermes. 

 ( 5. Arthropoda. 



6. Molluscoida. 



7. Mollusca. 



8. Vertebrata. 



For reasons already stated it is only with the fifth, seventh, 

 and eighth of these groups that the present work proposes to 

 deal ; and even with the fifth and seventh only partially and in 

 the most general way. 



The classes of the vertebrata, according to both the authors 

 above quoted, are: 1. Mammalia. 2. Aves. 3. Eeptilia. 4. 

 Amphibia. 5. Pisces, in which order they will be taken here. 



The sub-classes and orders of mammalia are as follows : 



MAMMALIA. 



Huxley (1869), Flower (1870). 



1. Primates 



2. Chiroptera 



3. Insectivora 



Monodelpbia... < 



4. Carnivora 



5. Cetaeea ) 



6. Siren ia ) 



7. Ungulata 



8. Proboscidea . . 



9. Hyracoidea .. 

 10. Rodentia 



ill. Edentata 



Didelphia 12. Marsupialia . . 



Ornithodelphia 13. Monotremata 



Carus (1868). 

 { 1. Primates. 

 \ 5. Prosimii. 



2. Chiroptera. 



3. Insectivora. 

 5 6. Carnivora. 



I 7. Pinnipedia. 



12. Natantia. 



5 10. Artiodactyla. 

 I 11 Perissodactyla. 



9. Proboscidea. 



8. Lamnungia. 



4. Rodentia. 



13. Brut a. 



14. Marsupialia. 



15. Monotremata. 



