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TABLE OF CONTENTS. 



PAGE 



GRADE A. PROTOZOA (Plastidozoa), . . . . .2 



Class I. Rhizopoda (Gymnomyxa), ..... 4 



Order 1. Proteomyxa, ....... 4 



Order 2. Labyrinthulidea, ...... 4 



Order 3. Mycetozoa (Myxomycetes), . . .. . .4 



Order 4. Amoeboidea, ....... 5 



Order 5. Foraminifera (Reticularia), . . . . .5 



Order 6. Heliozoa, . . . . . .6 



Order 7. Radiolaria, . . . . . .6 



Class II. Infusoria (Plegepoda), ...... 7 



Order 1. Flagellata (Mastigophora), ..... 7 



Order 2. Ciliata, ..... .8 



Order 3. Suctoria (Acinetaria, Tentaculifera), . .8 



Class III. Gregarinida (Sporozoa), . . . . . .10 



GRADE B. METAZOA (Enterozoa), . . . . .11 



Phylogenetic Scheme, . . . , . . .11 



Comparative Table of Metazoa, . . . . . 12, 13 



SUBGRADE A. CCELENTERATA (Diploblastica), . . . . .14 



Phylum I. Spongiae (Porifera), ...... 20 



Order 1. Silicospongise, ....... 20 



Order 2. Calcispongise, ....... 20 



Phylum II. Cnidaria (Nematophora), . . . . .22 



Class I. Hydrozoa (Polypomedusse), . . . . .22 



Order 1. Hydromedusaa, . . . . . .22 



Order 2. Siphonophora, . . . . . .22 



Order 3. Acalephse (Scyphomedusse, Acraspeda), . . .22 



