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: 



BRANCH I. PROTOZO'A (protos, first ; zoon, animal) 

 Class I. Rhizop'oda (rhiza, root ; pous, foot). 



Amce'ba, Difflu'gia. 



Class II. Infuso ria (organisms found in infusions). 

 Order 1. Flagella'ta (flagellum, a whip). 



Euglen'a, Codosig'a, Pandori'na, Vol'vox. 

 Order 2. Cilia'ta (cilium, an eyelash). 

 Paramce'cium, Vorticel'la. 



MANY-CELLED ANIMALS (Metazoa): 



BRANCH II. PORIF ERA (porus, pore ; fero, to carry) 

 Class I. Forifera (or sponges). 



BRANCH III. COELENTERA TA (animals with combined body and 



stomach cavity) 

 Class I. Hydrozo'a (hydra, water-serpent ; zoon, animal). 



Hy'drOf Gfonionemus, Hydractin'ia, Portuguese man-of-war. 

 Class II. Scyphozo'a (scyphos, cup ; zoon, animal). 



Rhlzos 'toma, Halidys'tus. 

 Class III. Actinozo'a (actis, a ray ; zoon, animal). 



BRANCH IV. PLATYHELMIN'THES * (platus, flat ; helminthos, 



a worm) 



Class I. Plato'da (platus, flat; eidos, likeness). 

 Plana'ria, Leptdpla'na. 



* For purposes of convenience, the flatworms (Platyhelminthes), 

 roundworms (Nematelminthes), and segmented worms (Annelids) are 

 combined in one branch (The Worms) in the text. 



247 



