Classification 



be allowed tanks, which should be filled with water and 

 furnished with growing water-plants. While they are 

 given access to water, they should also be furnished 

 with the equivalent of terrestrial conditions ; in point, 

 the vivarium must be a replica of their natural haunts. 



CHAPTER VI 



CLASSIFICATION 



By the Editor 



Zoologists, basing their conclusions on the most recent 

 research, now classify the members of the Animal 

 Kingdom into twelve great divisions, each of which is 

 called a cc Phylum " (plural, " phyla "). These divisions 

 are — 



i. Protozoa (Gr. y protos y first ; zoon, animal), com- 

 prising the simplest known animal forms, all of which 

 are one-celled and microscopic in size. 



2. Coelenterata (Gr., koilos, hollow ; enteron, 

 inside). This phylum includes the Hydra, Jelly-Fish, 

 and Sea-Anemones. 



3. Porifera (L,.,porus y a pore \ferre, to bear). The 

 Sponges. 



4. Echinodermata (Gr., echinos, hedgehog ; derma y 

 skin), including Starfish, Sea-Urchins, Sea-Cucumbers. 



5. Annelida (L., annulus, a ring). Ringed or 

 segmented Worms, of which the Earth- Worm is an 

 example. 



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