Syphilitic ' Caries.' 295 



maxillary, and left malar bones. The frontal bone is the most 

 affected. Between the frontal eminences there is a large patch 

 where the surface is roughened and in places eaten away. The 

 roughness is due to the opening out of vascular channels. From 

 this patch extensions pass down to the external angular processes, 

 and some tissue is lost at a corresponding part above each orbit. 

 The rest of the vault of the skull shows changes similar to 

 those seen on the frontal bone, only less marked. The 

 bones of the skull are not thickened but the diploii is con- 

 densed. The left malar and superior maxillary bones are 

 roughened on their facial aspect, partly by new periosteal bone, 

 and partly by the opening out of vascular channels. A slight 

 degree of the same change is seen on the right superior maxillary 

 and malar bones. B. C. i. 7. M. 22. 



6. 243. Syphilitic Disease of the Skull.— Skull and lower jaw 



of a negro — macerated, illustrating the above. 



At the right frontal eminence and below the left one there 

 is considerable loss of the surface from erosion, and possibly 

 from superficial necrosis. On the left side the skull is also 

 perforated. Eound these places there are the usual pores due 

 to increased vascularity, which have been opened out into 

 irregular pits here and there. A somewhat similar condition is 

 seen on the lower jaw, below and behind each mental foramen. 

 Some roughness is seen on the malar and superior maxillary 

 bones. In the interior of the skull there are marks of increased 

 vascularity at various places, but especially on the frontal bone. 

 The skull, as a whole, seems thick, and the sutures are distinct. 



B. C. I. 7. M. 25. 



6, 244. Syphilitic Disease of the Skull.— Skull of an adult, 



apparently a woman — macerated, illustrating the above. 



All over the vault there are patches of loss of surface or 



