USED IN NATURAL HISTORY. 



embraces the study of animals. 

 Cuvier distributed them into four 

 large groups: viz., Vertebrata, 

 Mollusca, Articulata, and Radiata. 



More recent writers have modi- 

 fied this arrangement and intro- 

 duced new terms, as may be seen 

 in the following table : 



I. Sub-kingdom. VERTEBRATA. 



My'elence'phala, (Owen.) 

 Spinice'rebrata, (Grant.) 



Class 1. Mammalia. 

 " 2. Aves. 

 " 3. Amphibia. 



Class 4. Reptilia. 

 5. Pisces. 



II. Sub-kingdom. ARTICULATA. 

 Homoganglia'ta, (Owen.) 



Diploneu'ra, (Grant.) 

 /?nnu/o'sa, (Macleay.) 



Class 1. Cirrhopoda. 

 2. Annellida. 

 " 3. Myriapoda. 



Class 4. Insecta. 

 u 5. Arachnida. 

 " 6. Crustacea. 



III. Sub-kingdom. MOLLTTSCA. 



Heteroga'ngliata, (Owen.) 

 Cycloganglia'ta, (Grant.) 



Class 1. Cephalopoda. 

 44 2. Gasteropoda. 

 3. Brachiopoda. 



Class 4. Pteropoda. 

 " 5. Conchifera. 

 6. Tunicata. 



IV. Sub-kingdom. RADIATA. 

 Cycloneu'ra, (Grant.) 



Nematoneu'ra, (Owen.) d'crita, (Macleay). 



Class Radia'ria. Lamarck. 



Echinode'rma. Cuvier. Acale'pha. Cuvier. 



Class Polypi, Cuvier. 



Ciliobrachia'ta, Farre. Anthozo'a, Ehrenberg. Nudibrachia'ta, Farre. 

 Class Entozo'a, Rudolphi. 



Coelelmi'ntha, Owen. Sterelmi'ntha, Owen. 



Class Infuso'ria, Cuvier. 



Rotif era, Ehrenberg. 



Polyga'stria, Ehrenbtrg. 



