By Mr. Storer Bennett. 



121 



having been broken away since death. The ridges for muscular 

 attachment are very prominent and the inner edge o£ alveolus round 

 the second and third molars is thickened by the deposit of nodules of 

 new bone, as though some irritation had been present during life. 

 The teeth are moderately worn and have a small amount of tartar. 



No. 20. Anterior portion of a lower maxilla containing the in- 

 cisors, canines, and left first bicuspid and first molar. The left 

 second bicuspid was lost during life, and its socket partly filled up 

 by new bone. The roots of the central incisors are slightly, and 

 the right lateral and canine are considerably, eroded on their anterior 

 surfaces at the neck, and the central incisors are worn away almost 

 to the lower margin of the enamel. There are some small masses of 

 tartar upon the teeth. 



No. 21. Chief portion of right half of lower maxilla, containing 

 four large and well-formed teeth — the three molars and first bicuspid. 

 The sockets of the other teeth are in good condition, but empty, 

 their former contents having disappeared since death. 



The teeth are slightly worn, and have small masses of tartar de- 

 posited upon them. The first molar had its postero-internal angle 

 injured during life, the enamel and some dentine having disappeared 

 at this spot, but the edges of the seat of injury are rounded, showing 

 that the injury was antecedent to death. The buccal surface of the 

 second molar is also injured in a somewhat similar manner, though, 

 as the edges are much less rounded, the injury may not improbably 

 be post mortem. The wisdom tooth has also been slightly injured. 



The alveolar edge on the inner side of the second and third molars 

 is thickened and rough, new bone having been deposited as the result 

 of inflammation of a chronic character, while the bone on the inner 

 and outer sides of the wisdom tooth is cupped from absorption 

 having occurred at the same time. 



No. 22. Portion of body and ascending ramus of right lower 

 jaw, containing the three molars. The specimen is from a young 

 adult, as is shown by the wisdom tooth being but very little worn. 

 The teeth bear some small masses of tartar upon them. Evidently 

 much more existed during life, but the bulk of it has subsequently 

 been lost. 



