CONTENTS 



PAGE 



INTRODUCTION iii 



The Laboratory and its Equipment ix 



The Cultivation and Preparation of Material . . . xi 



CHAPTER 



I. BRANCH PROTOZOA; The One-celled Animals i 



The Amoeba i 



The Euglena 3 



The Paramecium 5 



The Vorticella 8 



The Stentor 9 



The Stylonychia 10 



The Classification of the Protozoa 12 



II. BRANCH PORIFERA: The Sponges ... 15 



The Fresh-water Sponge ...... 15 



The Marine Sponge 16 



The Classification of the Porifera 18 



III. BRANCH CCELENTERATA : The Hydras and Sea- 



anemones 20 



The Fresh-water Hydra 20 



The Campanularian Hydroid 23 



The Hydro-medusa 26 



The Tubularian Hydroid 27 



The Classification of the Coelenterata .... 29 



IV. BRANCH TROCHELMINTHES : The Rotifers and 



THEIR Allies 31 



The Rotifer, or Wheel Animalcule . . . -31 



The Classification of the Rotifers and their Allies . . 33 



