IV 



CONTENTS OF PART I. 



PAGE 



THE CEREBRAL HEMISPHERES continued. 

 Variations in Fissures and Convolu- 

 tions 161 



Causation of Gyri and Sulci . . . 162 

 Structure of White Matter . . -163 

 Structure of Grey Matter . . . 166 

 Differences of structure in different 

 parts . . . . . . 172 



MEASUREMENTS OF THE BRAIN . . . 176 



Dimensions . . . , 176 



Extent of Grey Cortex . ''-. 176 

 Thickness of Cortex . . . .177 

 Weight 178 



PAGE 



MEMBRANES OF BRAIN AND SPINAL CORD 181 



Dura Mater 181 



Subdural space . ^ . . . . 184 



Pia Mater 184 



Arachnoid Membrane . . . . 187 

 Subarachnoid Space . . . .187 

 Ligamentum Denticulatum . . . 189 

 Glandulae Pacchionii . . . .190 



BLOOD-VESSELS OF BRAIN AND SPINAL 



CORD . . . . . . 191 



Spinal Cord . '. . . . .191 



Brain ....... 193 



LYMPH-PATHS OF BRAIN AND SPINAL CORD 198 



