TABLE OF CONTENTS. xxxi 



PAGE 



The Envelopes of the Cerebro-spinal Axis .... 660 



1. The Dura Mater ...... 661 



2. The Arachnoid . .... 663 



3. The Pia Mater ... 665 

 Differential Characters in the Protecting and Enveloping Parts of the 



Cerebro-spinal Axis in other than Soliped Animals . . . 666 



Comparison of the Protective and Enveloping Parts cf the Cerebro-spinal 



Axis of Man with those of Animals .... 666 



CHAPTER II. The Spinal Cord . . . . . . .666 



External Conformation of the Spinal Cord .... 666 



Internal Conformation and Structure of the Spinal Cord . . . 668 



Differential Characters in the Spinal Cord of the Domesticated Mammals 



other than Solipeds ...... 672 



Comparison of the Spinal Cord of Man with that of Animals . . 672 



CHAPTER III. The Eucephalon ...... 672 



Article i. The Encephalon as a Whole ..... 672 



Article n. The Isthmus ....... 675 



External Conformation of the Isthmus ..... 675 



1. The Medulla Oblougata ..... 676 



2. The Pons Varolii . . . . . . .677 



3. The Crura Cerebri ...... 677 



4. The Crura Cerebelli . . . . . .678 



5. The Valve of Vieussens ...... 679 



6. The Corpora Quadrigemina, or Bigemina .... 679 



7. The Optic Thalami ...... 679 



8. The Pineal Gland . . . . . . .680 



9. The Pituitary Gland . ... 681 

 Internal Conformation of the Isthmus ..... 682 



1. The Middle Ventricle, or Ventricle of the Optic Thalami . 682 



2. The Aqueduct of Sylvius . . 683 



3. The Posterior, or Cenfcellar Ventricle .... 683 

 Structure of the Isthmus ... ... 683 



Differential Characters in the Isthmus of other than Soliped Animals . 685 



Comparison of the Isthmus of Man with that of Animals . . . 685 



Article in. The Cerebellum ...... 686 



1. External Conformation of the Cerebellum .... 686 



2. Internal Conformation of the Cerebellum . . . 688 

 Differential Characters of the Cerebellum in other than Soliped Animals . 689 

 Comparison of the Cerebellum of Man with that of Animals . . 689 



Article iv. The Cerebrum . . . . . . .689 



External Conformation of the Cerebrum .... 690 



1. The Longitudinal Fissure . . . . . .690 



2. The Cerebral Hemispheres ..... 691 

 Internal Conformation of the Brain ..... 692 



1. The Corpus Callosum ...... 693 



2. The Lateral, or Cerebral Ventricles . . . 693 



3. The Septum Lucidum ...... 694 



4. The Cerebral Trigonum (or Fornix) . .694 



5. The Hippocampi ...... 695 



6. The Corpora Striata ... 695 



7. The Cerebral Choroid Plexus, and Velum Interpositum . . 696 

 Structure of the Cerebrum . . . . . .697 



Differential Characters in the Brain of other than Soliped Animals . 698 



Comparison of the Brain of Man with that of Animals 698 



