#2. Of the various impreffions, pits, 

 and furrows in this cavity. 



Marks of the longitudinal, and 

 lateral finus's, &c. 



63. Divifion of its internal bafis. 



64. Defcription and ufe of the Procef- 

 JeS) &c. in the cavity of the fkulL 



65. Remarks on the attachment of 

 the Dura Mater. 



66. Of the different foramina, for 

 the paflage of blood-veffels and 

 nerves, 



Obfervations on the ufe of each. 



67. a Remarks on the entrance of the 

 carotid and vertebral arteries into 

 the Ikull. 



68. Of fradures of the fkulL 

 Of concuffions. 



Operation of the trepan, when 

 neceflary and how performed. 



Cautions to the furgeon in per- 

 forming this operation. 



B 2 69, Defcrip- 



