t CONTENTS 



:hapter page 



4. Excretory System 201 



5. Reproductive System 204 



6. Endocrine System 206 



7. Nervous System 208 



XVI. Vertebrate Development 222 



A. Development of the Frog 222 



B. Development of the Chick 232 



C. Development of the Mammal 236 



PART II 



LARORATORY DIRECTIONS 



Introduction 241 



A. Equipment 241 



B. The Use and Care of the Microscope 241 



C. Microscopic Preparations 243 



D. Laboratory Drawings 243 



Preliminary Microscopic Work 245 



Cellular Organization of Protoplasm (1) 247 



Cellular Organization of Protoplasm (2) 249 



Green Plants 251 



Colorless Plants, or Fungi 253 



Protoplasmic Movement 255 



Amoeba 257 



Euglena 259 



Volvox 261 



Paramecium 263 



Vorticella 265 



Grantia 267 



Hydra 269 



Obelia 271 



Gonionemus 273 



External Anatomy of the Starfish 275 



Internal Anatomy of the Starfish 277 



External Anatomy of the Earthworm 279 



Internal Anatomy of the Earthworm (1) 281 



Internal Anatomy of the Earthworm (2) 283 



Body Plan of the Earthworm 285 



External Anatomy of the Crayfish (1) 287 



External Anatomy of the Crayfish (2) 289 



