LIST OF ILLUSTRATIONS. Xvii 



FIG. PAGE 



1 06. A diagrammatic representation of the visceral efferent com- 



ponents in a trunk segment 199 



107. Diagram to show the central relations of the IX, X and XI 



nerves in mammals according to Onuf and Collins . . . 201 



108. A diagram of the sympathetic system and the arrangement 



of its neurones in a mammal. Chiefly after Huber . . . 209 



109. Diagram illustrating the spinal representation of the sympa- 



thetic nerve in a mammal. From Onuf and Collins ... 210 

 no. A diagram to illustrate Langley J s " axone reflex " .... 213 

 in. Tract cells in the spinal cord of the trout. After Van Ge- 



huchten 219 



112. The relations of the cerebellum, brachium conjunctivum and 



gustatory tracts in selachians (Scyllium) 226 



113. Transverse section through the cerebellum of the sturgeon . 227 



114. Transverse section through the cerebellum and secondary 



gustatory nucleus of the sturgeon 228 



115. Transverse section of the brain of the sturgeon at the junc- 



tion of cerebellum and midbrain 229 



116. Transverse section through the midbrain of the sturgeon . . 230 



117. The relations of the cerebellum, brachium conjunctivum 



and gustatory tracts in a ganoid fish (Acipenser) . . . . 231 



1 1 8. A, the left lateral aspect of the brain of a pouch specimen 



of Dasyurus viverrinus; B, median sagittal section through 



the cerebellum of the same brain. After G. Elliot Smith . 232 



119. A diagram representing the fundamental and more constant 



secondary fissures of the mammalian cerebellum spread out 



in one plane. After G. Elliot Smith 234 



120. The mesial surface of the right half of the brain of Squalus 



acanthias 236 



121. A diagrammatic transverse section of one fold of the cere- 



bellum. From Koelliker 238 



122. Net-like fiber ending in the human cerebellum. After Cajal. 241 



123. Two schemes to show the course of impulses in the cerebellar 



cortex. From Cajal 242 



124. Two transverse sections through the cerebellum of Scyllium. 244 



125. A transverse section through the cerebellum of Necturus . . 246 



126. A transverse section through the deep gray nuclei of the 



cerebellum of man 2 47 



127. Outline transverse sections through the mesencephalon of a 



