CONTENTS. 



PAGE 



Exterior of the Cerebrum . . 522 

 Internal or Median and Ten- 

 torial Surface, . . . 531 

 Base of the Cerebrum . . 533 

 Internal Parts of the Cerebrum 537 

 Internal Structiire of the Cere- 

 brum . . . .553 

 White Matter . . . 553 

 Grey Matter . . . 556 

 Meynert's Terminology . 564 

 Origin of the Cranial Nerves . 565 

 Membranes of the Brain and 



Spinal Cord . . . . 569 



The Dura Mater . . .569 



The Pia Mater . . . . 571 



The Arachnoid Membrane . 572 



Blood-Vessels of the Brain and 



Spinal Cord . . -576 



Blood-Supply of the Brain . 576 

 Size and Weight of the Enceph- 



alon 577 



Weight of the Spinal Cord . 582 

 Specific Gravity of the En- 



cephalon . . . . 582 



Organs of the Senses . . 583 



The Eye 583 



The Eyelids and Conjunctiva . 583 



The Lachrymal Apparatus . . 587 



The Globe of the Eye . . 588 



The Sclerotic Coat . . . 589 



PAGE 



The Cornea . . , 592 



The Choroid Coat . . . 598 

 The Iris . . , .601 



Eetina or Nervous Tunic . 605 

 The Vitreous Body . .619 



The Lens . . . . 622 

 Aqueous Humour and its 



Chamber . . . 626 



The Eapv - 626 



External Ear .... 626 



The Pinna . . . . 626 

 The External Auditory 



Canal .... 630 



The Middle Ear orTympanam 630 



Small Bones of the Ear . . 635 

 Ligaments and Muscles of 



the Tympanum . . . 637 



The Lining Membrane . 639 



Vessels and Nerves . . 640 



The Internal Ear or Labyrinth. 641 



The Osseous Labyrinth . 641 



The IVIembranous Labyrinth 645 



Vestibule . . . . 645 



Semicircular Canals . . 646 

 Cochlea . . . ..651 



Organ of Corti . . . 657 



The Nose 664 



Cartilages of the Nose . . 665 



Nasal Fossae . . . . 667 



Mucous Membrane. . . 668 



EMBRYOLOGY; OR, DEVELOPMENT OF THE FCETUS AND 



ITS ORGANS. 



The Ovum : its Maturation, Fe- 

 cundation, AND Segmenta- 

 tion : Formation of the 

 Blastoderm .... 673 

 The Mature Ovarian Ovum . . 673 

 Distinction of the Germ . . 673 

 Disappearance of the Germinal 



Vesicle . . ... 674 

 Fecundation .... 675 

 Segmentation of the Yolk . . 676 

 In the Mammal's Ovum . . 678 

 In the Bird's Ovum . . . 679 

 The Blastoderm : its Struc- 

 ture and Relation to the 

 Development of the Em- 

 bryo 681 



Position and Extent . . . 681 

 Trilaminar Structure . . 683 



Eelation of the Layers to De- 

 velopment . . . . 683 

 Discovery of the Blastodermic 

 Elements .... 685 

 Short Outline of the more 

 General Phenomena of 

 Development of the Ovum 689 

 Distinction of Embryonic and 

 Peripheral Phenomena . . 6S9 



Intra-Embryonic Phenomena 



of Development . .691 

 Axial Eudiment of tlie Em- 

 bryo : Cere bro-Spinal Axis . 691 

 The Notoehord . . . . 692 

 Protovertebrye . . . 693 

 Pleural Cleavage of the Lateral 



Parts of the Mesoblast . . 693 

 Inllection of the Walls of the 



Body of the Embryo . . 694 

 The Cerebro-Spinal Nervous 



Centre . . ... 695 



The Nerves .... 695 



Organs of the Senses . . 695 



Vascular System . . . 696 



Alimentary Canal , . . 698 

 Eeproductive and Urinary 



Organs 699 



The Limbs .... 699 

 Extra-Embryonic Phenomena 



of Development. . . 700 



Foetal Membranes . . . 700 



The Yolk-Sac . . . . 700 



The Amnion .... 703 



The AUantois : Urinaiy Vesicle 704 



The Chorion . . . , 706 



Villi of the Chorion . . 709 



