CONTENTS. XV 



VIII. 



Proteus animalcule. Colourless blood corpuscles. 



Amoeba. Habitat — Movements — Histological structure — Physical 

 constitution — Physiology — Chemical composition — Effects of tempera- 

 ture and electric shocks. Colourless blood corpuscle. Facts 

 which show Amceba to be an animal — Reproduction of Amceba — • 

 Laboratory work. pp. 369 — 376 



IX. 



Yeast. 



General characters — Fermentation — Appearance under the micro- 

 scope — Structure of cells — Chemical composition — Mode of multipli- 

 cation — Gemmation — Spores — Physiology — Nutrition — Metabolism — 

 Laboratory work. pp. 377 — -388. 



X. 



Protococcus. 



Habitat — Histological structure — Physiology — Chlorophyll — Depen- 

 dence on light — Mode of multiplication — Macrozoospores — Microzoo- 

 spores — Laboratory work. . . . pp. 389 — 395. 



XL 



Spirogyra. 



Habitat — External characters — Histological structure — Cell-division 

 — Sexual reproduction by conjugation— Zygospore — Physiology — Labo- 

 ratory work pp. 396—407. 



XII. 



Bacteria. 



General characters — Structure — Movements — Zooglcea stage- 

 Spores — Physiology — Relation to putrefaction — Life-history — Labora- 

 tory work. . . pp. 408— 414. 



