42 Injuries of Bone. 



person, in which a fissure beginning on each side near the vertex 

 extends downwards into the base, where the two meet. 



The fissure on the right side after splitting the parietal 

 bone has loosened the squamous portion of the temporal bone 

 from its articulations, and then has passed across the great 

 wing and body of the sphenoid. The joint between the 

 zygoma and the malar bone has been forced open. The main 

 fissure on the left side, after running through the front of the 

 parietal bone, has opened up the suture between the great wing 

 of the sphenoid and squamous part of the temporal bone before 

 passing to the base. A second fissure on this side extends 

 through the squamous portion of the temporal bone, and after 

 passing through the root of the zygoma meets the first one in 

 the glasserian fissure. The left condyle of the occipitalbone 

 has been broken off. G. C. 3393. 



3. 9. Fracture of the Base of the Skull.— Skull of a very old 



person — macerated — A quadrant has been removed from the 

 vaidt to show the above. 



The fracture begins at the squamous suture on the right 

 side as a fissure which passes through the roof of the tympanum, 

 crosses irregularly the body of the sphenoid, and ends in the 

 left foramen lacerum medium. The left mastoid process has 

 been broken off. The left zygomatic arch has been broken. 

 The upper jaw is edentulous, and the walls of the antrum are 

 as thin as paper, and in some places wanting. 



It should be noted that the roof of the naso-pharynx has 

 been involved in tliis and the last two specimens. G. C. 3312. 



3. 10. Long-itudinal Fissure of the Right Parietal and 



Frontal Bones. — Calvarium of an old man — in which the 

 sutures on the outer side are for the most part obliterated — 

 showing the above fissure. 



The patient, having fallen aliout ten feet, had landed on his head 

 on the stone causeway at Granton Breakwater. He lived in a comatose 



