TABLE OF CONTENTS. 



Differential Characters ia the Organs annexed to the Abdominal Portion of the 



Digestive Canal in the other Animals ..... 508 

 Comparison of the Organs annexed to the Abdominal Portion of the Digestive 



Canal uf Man with those of Animals ..... 510 



Chapter III.— The Digestive Apparatus of Birds . . . ,511 



BOOK III. 



RESPIRATORY APPARATUa 



Chapter I.— Respiratory Apparatus in Mammalia . , , 517 



The Nasal Cavities ........ 517 



1. The Nostrils .... .o. 518 



2. The Nasal Fossae .... . . 519 



3. The Sinases ..... . . 524 



Differential Characters in the Nasal Cavities of the other Animala . . 526 



Comparison of the Naisal Cavities of Man with those of Animals . 527 



The Atr-tube succeeding the Nasal Cavities ..... 527 



1. The Larynx ........ 527 



2. The Trachea ....... 536 



3. The Bronchi ........ 539 



Differential Characters in the Air-tube succeeding the Nasal Cavities in the 



other Animals ........ 541 



Comparison of the Larynx and Trachea of Man with these Organs in the 



Domesticated Animals ....... 542 



The Thorax ......... 542 



Differential Characters in the Thorax of the other Animals . . 545 



The Lungs ......... 546 



Differential Characters in the Lungs of the other Animals . . 552 



Comparison of the Larynx, Trachea, and Lungs of Man with those of Animals . 553 



The Glandiform Bodies connected with the Respiratory Apparatus . 554 



1. The Thyroid Body or Gland . . . . . .554 



2. The Thymus Gland ....... 555 



Differential Characters in the Glandiform Bodies annexed to the Respiratory 



Apparatus in the other Animals ...... 556 



Comparison of the Glandiform Botlics annexed to the Respiratory Apparatus 



in Man with those of Animals ..... 557 



Chapter II.— The Respiratory Apparatus of Birds .... 557 



• BOOK IV. 

 URINARY APPARATUS. 



1. The Kidneys ........ 568 



2. The Ureters ........ 574 



3. The Bladder ........ 575 



4. The Urethra ........ 578 



5. The Supra-renal Capsules ...... 578 



Differential Characters of the Urinary Apparatus in the other Animals . 579 



Comparison of the Urinary Apparatus uf Man witli that of Animals . 581 



BOOK V. 



CIRCULATORY APPARATUS. 



riRST SECTION.— THE HEART . , .... 583 



1. The Heart as a Whole ....... 583 



2. External Conformation of tlie Heart ..... 584 

 8. Internal Conformation of the Heart ..... 587 



