CONTENTS 



CHAPTER I 



THE CELL 



Inteodtjotion 



PAGE 



1 



PROTOZOA 



Systematic Review .... . . 4 



1. Protoplasm . . . . . 13 



2. Adaptations for Locomotion . . . \i 



3. Membranes, Shells, Skeletal Formations . 15 



4. Adaptations for Ingestion of Food . 16 



5. Adaptations for Excretion 17 



6. Trichooysts . . 17 



7. Stigmata (red eye-spots) . 18 



8. Nuclei . . . 18 



9. Keproduotion . . . 18 

 Literature . . ..... 22 



Egg Cells, Sperm Cells, Fertilisation, Sexual Reproduction of the 



Metazoa ...... . . 23 



The Animal Egg . . ... 25 



The Egg Yolk .... . . 26 



1. Types of Telolecithal Eggs . . 27 



2. Types of Centrolecithal Eggs 28 

 The Egg Envelopes . . 28 



Male Reproductive Cells, or Spermatozoa . 30 



Maturation of the Egg . . 31 



Fertilisation . 32 



Literature ... . 34 



Tissue Cells and Cell Tissue 34 



1. Epithelial Tissue . . 36 



