416 Diseases of Bone. 



vault does not seem to have been altered. The " diploe " is for 

 the most part unduly porous, although here and there it has 

 been obliterated. G. C. 3225. 



Presented by Chakles "W. Cathcart, F.R.C.S.E. 



6. 522. Senile Chang-es in the Lower Jaw.— Lower jaw- 

 macerated, illustrating the above. 



The angle of the jaw is unusually obtuse even for an old 

 person. The teeth must have dropped out long before death on 

 the left side, but some sockets remain on the right side. The 

 corresponding differences in the alveolar border should be noted. 



G. C. 3307. 



h. Local Conditions affecting the Growth and Nutrition of the Skull. 



6. 523. Slcull Artiflcially Flattened on the Top in Child- 

 hood. — Skull probably of a South American Indian — 

 macerated, illustrating the above. 



Some of the Soutli American Indian tribes have a fashion of bandag- 

 ing their infants' and children's heads between two flat boards until the 

 shape is permanently altered. This change in shape does not seem to 

 affect the mental capacity of the individuals. 



The skull has been flattened upon the top, and broadened 

 out at the base and towards the back. The sutures are partially 

 obliterated, as they might have been from advancing age in any 

 case. G. C. 3588. 



6. 524. Skull Artificially Flattened on the Top in Child- 

 hood. — Another similar specimen. From the worn appearance 

 of the surface and crumbling character of the bone, this skull 

 had probably been buried for some time before it was obtained. 



G. C. 3589. 



