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 (1869). 
1. Protozoa ) 
2. Infusoria J 
3. Coelenterata 
4. Annuloida 
5. Annulosa 
6. Molluscoida 
7. Mollusca 
8. Vertebrata 
CAJUTfl AND GERSTAEKER. 
Handbuch der Zoologie (1868). 
1. Protozoa. 
2. Coelenterata. 
3. Echinodermata, 
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. Beptilia. 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). 
Monodelphia... 
Didelphia 
Ornithodelphia 
1. Primates 
2. Chiroptera .. 
3. Insectivora .. 
4. Carnivora .. 
.5. Cetacea) 
6. Siren ia ) 
7. Ungulata 
8. Proboscidea., 
9. Hyracoidea .. 
10. Rodentia 
1 ] . Edentata 
12. Marsupialia . . 
13. Monotremata 
Cakus (1868). 
< 1 . Primates. 
( 5. Prosimii. 
2. Chiroptera. 
3. Insectivora. 
i 6. Carnivora. 
( 7. Pinnipedia. 
12. Natantia. 
( 10. Artiodactyla. 
(11. Perissodactyla, 
9. Proboscidea. 
8. Lamnungia. 
4. Rodentia. 
13. Bruta. 
14. Marsupialia. 
15. Monotremata. 
