VI CONTRNTS. 



Page 



4, Formation and Developement of the Teeth 1 '^9 



5. Trituration of Food in Internal Cavities 149 



6, Deglutition 156 



7. Receptacles for retaining Food 159 



Chapter VII. — Digestion 161 



Chapter VIII. — Cii ylificatiox 180 



Chapter IX. — Lacteal Absorption 200 



Chapter X. — Circulation 204 



§ 1 . General Plans of Circulation 204 



2. Details of Structure in the different orders of 



Animals 214 



3. Distribution of Blood Vessels 255 



Chapter XI. — Respiration 263 



§ 1 . Respiration in general 263 



2. Aquatic Respiration 266 



3. Atmospheric Respiration 279 



4. Chemical Changes effected by Respiration 299 



Chapter XII. — Secretion ., 307 



Chapter Xlll. — Absorption 316 



Chapter XIV, — Nervous Poaver 318 



PART III.— THE SENSORIAL FUNCTIONS. 



Chapter I. — Sensation 3-26 



Chaptrr II. — Touch " 338 



CHAF-rrR III. — Taste 352 



Chapter IV. — Smeli 354 



