900 



adult incisor forming in a distinct socket, underneath :" and of fig. 3, "to show that the 

 bicuspides are formed in distinct sockets of their own, and not in the socket of the grinder, 

 which stands above." 



5847. (11.) The left upper maxillary bone of a Child. 



The two milk-molars are in place : the canine has been removed from its socket, and the 

 premaxillary part of the jaw removed to expose the germ of the permanent canine in its 

 formative socket. The germs of the first bicuspid and first true molar are similarly exposed 

 from the inner side. The crowns of an incisor and canine are separately displayed. 



5848. (6.) A section of the right upper maxillary bone of a Child. 



The two milk-molars are in place. The deciduous incisors and canine have been removed ; 

 behind their sockets the calcified summits of the permanent incisors may be seen through 

 the wide gubernacular openings. The crown of the first true molar may be seen in its 

 formative socket. 



5849. (13.) The left maxillary and left ramus of the mandible of a Child, in which 

 the deciduous teeth had been acquired and the first true molar was beginning 

 to rise into place, being more advanced in the lower than the upper jaw. 



The germs of the successional teeth and of the second true molars are exposed by the 

 removal of the outer walls of their formative alveoli. 



These preparations are figured (reversed) in pi. ix. fig. 1. Op. cit., with the following de- 

 scription : " One side of the Upper and Lower-jaw of a subject about eight or nine years of 

 age, where the Incisores and Cuspidati of the Foetus were shed, and their successors rising in 

 new sockets ; shewing likewise the two Grinders of the child, with the Bicuspides forming 

 underneath. The first adult Grinder was ready to cut the gum ; and the Second Grinder in 

 the Lower-jaw is lodged in the root of the coronoid process, and in the Upper-jaw it is in the 

 tubercle." 



5850. (14.) The left maxillary and a considerable proportion of the mandible of a 

 Child, at the same stage of dentition as the foregoing. 



The second milk-molar is in place in the upper jaw : the alveoli of the antecedent milk- 

 teeth have been removed to expose those containing the calcified crowns of the permanent 

 incisors, canine, and first bicuspid. The first true molar is exposed in its socket, and that of 

 the second true molar is shown behind. In the lower jaw the two milk-molars on each side 

 are left standing : the crowns of the four permanent incisors, canines, and anterior bicuspids 

 are exposed by the removal of the front walls of their formative sockets. The crowns of the 

 second bicuspids seem not to have begun to be calcified. 



