CONTENTS 



Part II 



CHAPTER I 



AMCEBA — UNICELLULAR AMI MULTICELLULAR ANIMALS 229 



23S 



PRACTICAL DIRECTIONS 



CHAPTER II 



H.'EMATOCOCCUS AND EUGLENA — MONADS AND BACTERIA— DIF- 

 FERENCES BETWEEN ANIMALS AND LLAN FS — SAPROPHYTES 24O 



PRACTICAL DIRECTIONS 



259 



CHAPTER III 

 PARAMCECIUM, OPALINA, VORTICELLA AND ITS ALLIES — PARA- 

 SITIC AND COLONIAL ORGANISMS — BIOGENESIS AND ABIO- 

 GENESIS — CLASSIFICATION OF THE UNICELLULAR ORGAN- 

 ISMS EXAMINED . . 261 

 PRACTICAL DIRECTIONS . . . 2S6 



CHAPTER IV 



hydra: EOUGAINVILLEA — alternation OF GENERATIONS — 



CHARACTERS OF THE PHYLUM CCELENTERATA . . 2S9 



3'4 



I'RACTICAL DIRECTIONS 



CHAPTER V 



1 HE EARTHWORM — CHARACTERS OF THE PHYLUM ANNUI.ATA 318 

 PRACTICAL DIRECTIONS 34I 



CHAPTER \T 



THE CRAYFISH — CHARACTERS OF THE PHYLUM ARTHROPODA . 346 

 PRACTICAL DIRECTIONS 372 



CHAPTER VH 



THE FRESH-WATER MUSSEL — CHARACTERS OF THE PHYLUM 

 MOLLUSCA — ENUMERATION OF THE CHIEF PHYLA OF THE 

 ANIMAL KINGDOM ... . . . . . . . 381 



PRACTICAL DIRECTIONS ... . 397 



