CONTENTS. XV 



VIII. 



Proteus anImalcule. Colourless blood corpuscles. 



^ Amceba. 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. 



V 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. 



XI. 



Spirogyra. 



Habitat — External characters — Histological structure — Cell-division 

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

 ratory work pp. 396 — 407. 



XIL 



Bacteria. 



General characters — Structure — Movements — Zoogloea stage — 

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

 tory work. pp.408 — 414. 



