CONTENTS 



CHAPTER I 



PAGE 



PHYLUM PROTOZOA i 



Class Rhizopoda i 



Class Mastigophora 3 



Class Sporozoa 4 



Class Infusoria 10 



CHAPTER II 



PHYLUM PORIFERA n 



CHAPTER III 



PHYLUM CCELENTERATA 15 



Class Hydrozoa 16 



Class Scyphozoa 16 



Class Anthozoa 17 



CHAPTER IV 



PHYLUM ECHINODERMATA 20 



Class Asteroidea 24 



Class Echinoidea 24 



Class Holothuroidea ; 24 



Class Ophiuroidea 25 



Class Crinoidea 25 



CHAPTER V 



PHYLUM PLATYHELMINTHES : FLAT-WORMS 26 



Class Turbellaria 27 



Class Cestoda 27 



Class Trematoda 29 



CHAPTER VI 



PHYLUM NEMATHELMINTHES : ROUND-WORMS 31 



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