118 



Notes on the teeth, Bowl's Barrow. 



upon which they have been used, the first molars naturally showing 

 this to the greatest extent. Small masses of tartar may be seen on 

 the teeth, especially the molars, and there is a considerable excava- 

 tion of the alveolus around the right second bicuspid and left wisdom 

 tooth, from absorption having taken place ; the result of some 

 chronic irritation? 



No. la. Lower jaw from a" young adult, containing the complete 

 dentition with the exception of the right canine, lost since death. 



The teeth are well formed and but slightly worn, but some 

 irritation appears to have caused a little absorption of bone in front 

 of the right second molar. 



No. 15, Ascending ramus, with condyle and coronoid process, 

 and part of the horizontal ramus of a right lower jaw, from a child 

 about 5^ to 6 years of age ; containing the two temporary molars, 

 the roots of which are but very slightly absorbed, and (in their 

 bony crypts) the crowns of the developing canine, bicuspids, and 

 first and second molars of the permanent series. These have been 

 laid bare by the removal of some of the surrounding alveolus. 



No. 15a. Crown of a right upper bicuspid which had been erupted 

 for a short time, for it bears marks of some slight wear on the 

 masticating surface ; the root was, however, only partly developed, 

 showing that the tooth had never been completed, and indicating 

 the probable age of the subject from which it was taken as about 10 

 to 12 or 13 years. 



Marks of wear on the anterior and posterior aspects of the tooth 

 show that it had been subject to pressure in a crowded mouth, a 

 circumstance one would not have expected to find. 



No. 16. Lower maxilla, large and well-proportioned; breadth 

 across from the sigmoid notches 3f in. The coronoid processes rise Jin. 

 above the level of the condyles ; extreme antero-posterior measure- 

 ment, 3fin. Genial tubercules strongly marked. The ridges for 

 muscular attachment are not especially prominent. 



The teeth present are the four incisors, right canine, first bicuspid 

 and molar, the left second bicuspid and first and second molars. 

 The right second bicuspid, second molar, and left canine have 

 evidently been lost during life, since their alveolar sockets have 



