CLASSIFICATION. 303 



ment perhaps not very much unlike that shown in the an 

 nexed diagram. 



/ . . Crustacea 



Art! cilia ta. 



VERTEB RATA 



l 



I 



AN NU LOS. A 

 lAnnciicla* 



\Brachic/ioda. 



M ollu s c 6Tda ~&quot; 



/PROTOZOA 



/ 



9 / S/icngida 



CCEL E N TERATA 



In this diagram, the dots represent orders, the names of 

 which it is impracticable to insert. If it be supposed that 

 when magnified, each of these dots resolves itself into a 

 cluster of clusters, representing genera and species, an ap 

 proximate idea will be formed of the relations among the 

 successively-subordinate groups constituting the animal king- 



