APPENDIX 



I. A BRIEF CLASSIFICATION OF ANIMALS 



The figures indicate the approximate number of known species. 



Phylum 1. PROTOZOA. (20,000 species.) 



Class I. Sarcodina: Amoeba, Foraminifera, Heliozoa, Radiolaria. 

 (Figs. 6, 8, 11, 13, 19-21, 244, 245.) 



Class II. Mastigophora: Flagellates. Monads, Trypanosomes, Eu- 

 glena, Volvox. (Figs. 18, 22-24, 224.) 



Class III. Sporozoa: Plasmodium, Monocystis. (Figs. 25, 223.) 



Class IV. Infusoria: Ciliates. Paramecium, Vorticella, Stentor. 

 (Figs. 18, 26-28, 135, 226.) 

 Phylum 2. PORIFERA: Sponges. (3000 species.) Leucosolenia, Grantia, 



Euspongia. (Figs. 35, 36.) 

 Phylum 3. COELENTERATA. (10,000 species.) 



Class I. Hydrozoa: Hydra, Obelia, Gonionemus. (Figs. 37, 38, 57, 

 58, 155, 158.) 



Class II. Scyphozoa: Jellyfish. Aurelia. (Figs. 39, 40.) 



Class III. Anthozoa: Sea Anemones, Corals. (Figs. 41, 42.) 

 Phylum 4. CTENOPHORA: Sea Walnuts. (100 species.) 

 Phylum 5. PLATYHELMINTHES: Flatworms. (7000 species.) 



Class I. Turrellaria: Planaria. (Figs. 43, 156, 161.) 



Class II. Trematoda: Liver Flukes. (Fig. 251.) 



Class III. Cestoda: Tapeworms. (Figs. 252, 253.) 



Class IV. Nemertinea. (Figs. 157, 159.) 

 Phylum 6. NEMATHELMINTHES: Roundworms. (3000 species.) 



Class I. Nematoda: Ascaris, Trichinella, Hookworm. (Figs. 44, 

 254, 255.) 



Class II. Nematomorpha: Gordius. 



Class III. Acanthocephala: Echinorhynchus. 

 Phylum 7. ANNELIDA: Segmented Worms. (7000 species.) 



Class I. Archi annelid a : Poly gordius. 



Class II. Polychaeta: Sandworms, Tubeworms. (Figs. 45, 166.) 



Class III. Oligochaeta: Earthworms, Naids. (Figs. 60, 160, 173.) 



Class IV. Gephyrea: Sipunculus. 



Class V. Hirudinea: Leeches. (Fig. 45.) 

 Phylum 8. ROTIFERA: Rotifers. (1800 species.) 

 Phylum 9. BRYOZOA: Bryozoans. (3000 species.) 

 Phylum 10. BRACHIOPODA: Brachiopods. (130 species.) 



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