VI CONTENTS. 



Page 



4. Formation and Developement of the Teeth . . 155 



5. Trituration of Food in Internal Cavities 167 



6. Deglutition 174 



7. Receptacles for retaining Food , 178 



Chapter VII. — Digestion , 180 



Chapter VIII. — Chylification 203 



Chapter IX. — Lacteal Absorption 226 



Chapter X. — Circulation , . 229 



§ 1. Diffused Circulation 229 



2. Vascular Circulation , . 235 



3. Respiratory Circulation 265 



4. Distribution of Blood Vessels 281 



Chapter XI. — Respiration 290 



§ 1 . Respiration in general 290 



2. Aquatic Respiration , , . . 293 



3. Atmospheric Respiration 310 



4. Chemical Changes effected by Respiration . . 333 



Chapter XII. — Secretion 342 



Chapter XIII. — Absorption 351 



Chapter XIV. — Nervous Power 354 



PART III.— THE SENSORIAL FUNCTIONS. 



Chapter I. — Sensation 362 



Chapter II. — Touch 377 



Chapter HI. — Taste 393 



