CONTENTS 



CHAPTER I 

 THE CELL 



PAGE 



INTRODUCTION ........ 1 



PROTOZOA 



Systematic Review ........ 4 



1. PROTOPLASM ........ 13 



2. ADAPTATIONS FOR LOCOMOTION . . . . . .14 



3. MEMBRANES, SHELLS, SKELETAL FORMATIONS . . . .15 



4. ADAPTATIONS FOR INGESTION OF FOOD . . . . .16 



5. ADAPTATIONS FOR EXCRETION . . . . . . 17 



6. TRICHOCYSTS ....... 17 



7. STIGMATA (red eye-spots) . . . . . . .18 



8. NUCLEI . . . . . . . . .18 



9. REPRODUCTION . . . . . . . .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 



