f'SII/ff 



c/'fioij prortsi 

 Giroftd gnore 



foremen . 



FIG. :6z. Cranial surface of base of skull. The middle fossa is coloured, and the posterior and anterior 

 fossae lie behind and in front of this coloured part respectively. On the right side, the positions of the 

 sutures are indicated, so that the bones which form each fossa can be seen. Compare with Fig. 181, 

 in which the dura mater is in place. 



