312 Diseases of Bone. 



over, is perforated by a narrow aperture communicating with 

 the groove for the longitudinal sinus. The inner surface has 

 marks of increased vascularity. The section of the bones shows 

 thickening, but the diploe still present. B. C. i. 7, M. 26. 



6. 277. Syphilitic Disease of the Skull— healed after Loss 



of Substance. — Skull-cap — macerated, illustrating the above. 

 The anterior part of the frontal bone shows two large 

 irregular depressions of the surface ; one is on the right side, 

 and is deeper, larger, and more irregular than the other, which 

 extends from the middle line to the left frontal eminence. 

 Except where the two depressions are contiguous, their 

 margins are slightly but distinctly raised. On the left side this 

 raised margin shows grooves and pores for numerous blood- 

 vessels, as if the process had been in progress, while on the 

 right side the surface of the raised part has been smoothed 

 over, A small hole in the base of the right depression com- 

 municates with the interior. The cerebral surface shows marks 

 of increased vascularity on the parietal and frontal bones. The 

 section of the frontal bone is increased in thickness. At other 

 places, although the bone is not thickened, the diploe is 

 condensed. F. P. C. 476. 



Presented by Professor RussEll. 



6, 278. Syphilitic Disease of the Skull— healed after Separ- 

 ation of a larg-e Sequestrum. — Anterior portion of the right 

 half of a calvarium and roof of orbit — macerated, illustrating 

 the above. 



During life a fungus cerebri projected through the aperture left by 

 the separation of a large sequestrum. 



The aperture is irregularly circular, and measures two 

 inches by three and a half inches in diameter. Its margins are 

 rounded off', as if the disease had subsided and the parts had 

 been healing. B. C. i. 7. M. 16. 



