CONTENTS. 



Preface 



PAGR 



iii 



Table of Adbretiations, etc. 



Preliminary Exercises ..... 



1. The Compound Microscope . 



2. The Cell 



Study I. Protozoa. One-celled Animals 



1. Amoeba ... 



2. Paramoecium. " Slipper Animalcule " 



3. A Comparative Study of Protozoa 



Study II. PORIFERA. Sponoes 



1: A Simple Sponge. Grantia . 



2. A Fresh-water Sponge. Spongilla 



.3. A Toilet Sponge. Skeleton of Euspongia 



Study III. CtELENTERATA. STINGING AnIMALS 



.1. Hydra 



2. A Campanularian Hydroid . 



3. A Tubularian Hydroid . 



4. A Hydro-medusa .... 



Study IV. Vermes. Worms 



1. A Planarian Worm 



2. The Earthworm . 



3. A Marine Annelid Worm 



1 

 1 



4 



6 

 6 



8 

 11 



13 

 13 

 15 

 15 



17 

 17 

 20 

 22 

 23 



26 

 26 

 27 

 34 



