THE CLASSIFICATION OF ANIMALS 55 



the animal kingdom. No attempt should be made now to 

 memorize this table. 



ANIMAL KINGDOM 



BRANCH I. PROTOZO'A (one-celled animals) 



Class I. Rhizdp'oda (amoeba, Heliozoa, Radiolaria, Foraminif- 



era, et al.). 



Class II. Mycetozo'a (slime-moulds). 

 Class III. Mastigoph'ora (whip-bearers, Euglena, trypanosomes, 



Spirochcsta, et al.). 

 Class IV. Sporozo'a (parasitic Protozoa such as Plasmodinm 



which causes malaria, Babcsia which causes Texas 



fever of cattle, et al.). 

 Class V. Infuso'ria (mostly free-swimming Protozoa provided 



with cilia, Paramcecium, Vorticella, et al.). 



BRANCH II. PORIF'ERA (sponges) 

 Class I. Par if era (sponges). 



BRANCH III. CCELEN'TERA'TA (se-len-te-ra'-ta) 



(Aquatic, mostly marine, radially symmetrical ani- 

 mals having a combined body and stomach cavity) 

 Class I. Hydrozo'a (fresh water hydra, marine hydroids, many 



of the small jelly-fish, a few stony corals, et al.). 

 Class II. Scyphozo'a (si-fo-zo'-a) (most of the large jelly-fishes). 

 Class III. Actliwzo'a (sea-anemones; most of the corals, et al.). 

 Class IV. Ctenoph'ora (ten-oph'-o-ra) (the comb- jellies, or sea- 

 walnuts). 



BRANCH IV. PLATYHELMIN'THES (flat-worms) 



Class I. Turbellar'ia (planarians, et al.). 

 Class II. Tremato'da (liver-flukes, et al.). 

 Class III. Ccsto'da (tape- worms). 



BRANCH V. NEMATHELMlN'THES (round-worms) 



Class I. Nemato'da (trichina, hookworms, et al.). 



Class II. Nematdmor 1 pha (horse-hair snakes, or cabbage- snakes, 



et al.). 



Class III. Acanthocepli'ala (thorn-headed worms). 

 Class IV. ChcstSg'natha (ke-t5g'-na-tha) (arrow- worms). 



