CHAPTEE XYI. 



THE ANIMAL KINGDOM. 



THE Animal Kingdom follows as next in the order of pro- 

 gression, after the Vegetable Kingdom. Its divisions, in their 

 regular order of ascension from lowest to highest, and also, 

 generally speaking, in respect to their successive periods of 

 development as shown by fossilology, are as follows : 



PRIMARY TRINITY. 



(Marine forms.} 



1. RADIATA (coral insects, crinoi- 

 dians, star-fishes, medusise, 

 etc.) 



2. ARTICULATA (sea-worrns, trilo- 

 bites, crabs, lobsters, etc.) 



3. VEUTEBRATED FISHES. 



SECONDARY TRINITY. 

 (Terrestrial forms.) 



4. REPTILES. (The lower forms 

 of this division embrace also the 

 terrestrial mollusca and articu- 

 lata, such as snails, worms, in- 

 sects, etc.) 



5. BIRDS. 



6. MAMMALIA. 



7. MAN as a terrestrial being. 



IN this table are represented three general divisions of ma- 

 rine forms, and three general divisions of terrestrial forms. 

 The first division of marine forms is to its sphere of existence 

 and to the divisions of marine forms which follow it, what the 

 first division of terrestrial forms is to its sphere of existence, 

 and to the divisions which follow it ; and so also the one trine 

 in its sphere corresponds to the other trine in its sphere, both 

 in the complex and in the successive divisions of each. 



It may be objected to the foregoing classification, that it 



