12 ZOOLOGY. 



included animals with and without a nervous system, 

 and differing widely in other important structures. This 

 group has, therefore, been broken up, and its members 

 assigned to various sub-kingdoms. 



Following closely the arrangement proposed by Pro- 

 fessor Huxley, we venture to divide the Animal King- 

 dom into seven primary groups or sub-kingdoms. 



The following table gives the great divisions of the 

 Animal Kingdom, together with the classes into which 

 they have been subdivided : 



SUB-KINGDOM I. Vertebrata. 



CLASS 1. Mammalia. Ex., Man, Horse, Deer. 



2. Aves (Birds). Ex., Hawk, Crow, Parrot, 

 Goose. 



3. Reptilia (Reptiles). Ex., Crocodile, Turtle, 

 Lizard, Snake. 



4. Amphibia. Ex., Frog, Toad, Newt, Sala- 

 mander. 



, 5. Pisces (Fishes). Ex., Herring, Salmon, Shark, 

 Kay. 



SUB-KINGDOM II Annulosa. 

 DIVISION I. Arthropoda. 



- CLASS 1. Insecta. Ex., House-Fly, Beetle, Bee, But- 

 terfly. 



2. Myriapoda. Ex., Centipede, Millipede. 



3. Arachnida. Ex., Scorpion, Spider, Mite. 



,, 4. Crustacea. Ex., Lobster, Crab, Shrimp, Bar- 

 nacle. 



DIVISION II. Anarthropoda, 



CLASS 1. Chsetognatha. Ex., Sagitta. 



2. Annelida. Ex., Earth-worm, Leech, Lob* 

 worm, Serpulse. 



