CONTENTS XV 



Page 



The Parulhyreoids, 410 



Technic, 412 



The Pituitary Body, 4^3 



Paraganglia 4^5 



Carotid Glands, 4^6 



Coccj'geal Gland, 4^7 



Adrenal Gland, 418 



General References, 4^1 



CHAPTER XXII 



The Nervous System, 422 



Histological Development and General Structure, 422 



Membranes of the Brain and Cord, 428 



Technic, 43° 



The Peripheral Nerves, 43° 



Technic, 432 



The Afferent Peripheral Neurones, 432 



The Cerebro-spinal Ganglia, 432 



The Peripheral Processes of the Cercbro-spinal Ganglion Cells, . . 435 

 The Central Processes of the Cerebro-spinal Ganglion Cells, . . . 442 



The Sympathetic Ganglia, 442 



Technic, 447 



The Efferent Peripheral Cerebro-spinal Neurones, 447 



The Spinal Cord, 448 



Origin of the Fibres which make up tlie White Matter of the Cord, . . . 449 

 (i) The Spinal Ganglion Cell and the Origin of the Posterior Col- 

 umns, 449 



(2) Cells Situated in Other Parts of the Central Nervous System 

 which Contribute Axones to the White Columns of the Cord, . . 450 



(3) Root Cells — Motor Cells of the Anterior Horn, 45° 



(4) Column Cells, 45° 



(5) Cells of Golgi Type II, 45i 



Technic, 45 ^ 



Practical Study, 453 



General Topography of the Cord, Cell Groupings, Arrangement of Fibres 



and Finer Structure, 454 



Practical Study of Sections through Lumbar Enlargement, .... 454 



General Topography, 454 



Cell Groupings, 45^ 



Arrangement of Fibres, 458 



Finer Structure, 459 



Blood-vessels, 460 



Variations in Structiure at Different Levels, 461 



Practical Study, 461 



Section through the Twelfth Thoracic Segment, 4^1 



Section through the Mid-thoracic Region, 461 



Section through the Cervical Enlargement, 461 



Fibre Tracts of the Cord, 465 



Ascending Tracts, 467 



I. Long Ascending Arms of Dorsal Root Fibres, 467 



