CONTENTS. Vii 



Page 



Chapter VIII. — Comparative Phtsiolooy of the Nervous System 378 



§1. Nervous System of Invcrteb rated Animals - - 378 



2. Nervous System of Vertebrated Animals - - - 388 



3. Functions of the Brain .... 395 



4. Comparative Physiolog-y of Perception - - - 398 



PART IV.— THE REPRODUCTIVE FUNCTIONS. 



Chapter I. — Reproduction ..... 408 



Chapter II. — Organic Development . - • . 420 



Chapter HI. — Decline of the System . - . . 433 



Chapter IV. — Unity of Design - - . . . 437 



Index - - - - - - - * - 449 



