44 Injuries of Bone. 



fracture of the left parietal bone. The specimen has become 

 contracted in drying. 



The ruptured part of the dura mater corresponds only 

 with the portion of the fissure within the vault, a part not 

 shown in the previous specimen. G. C. 2848. 



Presented hy P. H. Maclauen, F.R.C.S.E. 



3. 13. Brain injured by Fracture of the Skull.— Brain from 



the patient from whom the two previous specimens were taken. 

 There has been injury of the parietal lobe under the 

 rupture in the dura mater, but there is still more extensive 

 laceration at the base. The under surfaces of the left temporo- 

 sphenoidal and of both frontal lobes have been severely 

 lacerated. Possibly the injury to the frontal lobes may have 

 been associated with injury of the right occipital region, but the 

 injury to the left temporo-sphenoidal lobe is not what would 

 have been expected from an injury to the parietal bone on the 

 same side. See No. 3.5. G. C. 2846. 



Presented by P. H. Maclaren, F.R.C.S.E. 



3. 14. Fracture of the Base of the Skull.— Posterior part of 



the base of a skull — macerated — showing a longitudinal 

 fracture at the base. 



The left petrous portion of the temporal bone has been 

 broken off, and there are extensive fissures in the posterior 

 fossa, especially on the left side. On the right side a fissure 

 running along the upper surface of the petrous portion of the 

 temporal bone has entered the roof of the tympanum. 



F. P. C. 29. 



3. 15. Fracture of the Base of the Skull.— Posterior part 



of the base of a skull — macerated. 



In the right cerebellar fossa, close to the foramen magnum, 

 there are three short fissures parallel to one another. The 



