CLASSIFICATION OF ANIMALS 
The following table of classification is designed to show the systematic position 
of the more important animals mentioned in the text. 
ANIMAL KINGDOM 
ONE-CELLED ANIMALS: 
Brance I. PROTOZO’A (protos, first; zoon, animal) 
Class I. Rhizop‘oda (rhiza, root; pous, foot). 
Ame'ba, Diff gia. 
Class II. Infusé'ria (organisms found in infusions). 
Order 1, Flagella'ta (flagellum, a whip). 
Euglén'a, Cidisig'a, Pindori'na, Vél'véx. 
Order 2. Cilia'ta (ecliwm, an eyelash). 
Péirame'cvum, Vorticél'la. 
MANyY-CELLED ANIMALS (Metazoa): 
Braycu II. PORIFYBRA (porus, pore; fero, to carry) 
Class I. Porifera (or sponges). 
Brancu III. CALENTERA'TA (animals with combined body and 
stomach cavity) 
Class I. Hydrozi'a (hydra, water-serpent ; zoon, animal). 
Hydra, Gonioné'mus, Hidractin'ia, Portuguese man-of-war. 
Class II. Sc¥phozd'a (scyphos, cup; zoon, animal). 
Rhizos'toma, Haliclys' tus. 
Class III. Actindzo'a (actis, a ray; zoon, animal). 
Branco IV. PLATYHELMIN’THES * (platus, flat; helminthos, 
a worm) 
Class I. Plato'da (platus, flat; eidos, likeness). 
Plina'ria, Léptopla'na, 
* For purposes of convenience, the flatworms (Platyhelminthes), 
roundworms (Nematelminthes), and segmented worms (Annelids) are 
combined in one branch (The Worms) in the text. 
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