491 







2796. The second and third molars, right side, upper jaw. 



The second molar has been reduced to the dentinal base of the last five plates, which are 

 supported by as many long fangs with closed and pointed extremities. The third molar con- 

 sists of twelve plates, of which the summits of the first six have been in use. 



Hunterian. 



2797. The second and third molars of the left side of the same jaw. Hunterian. 



2798. The germ of the fourth molar, right side, upper jaw, including thirteen of the 

 constituent plates. 



Of these, the first four are united by continuity of the dentine at their base ; the rest are 

 cemented together, and the constituent denticles of the hindmost plates are well shown. 



Presented by Dr. Henderson. 



2799. The corresponding tooth from the left side of the same jaw. 



Presented by Dr. Henderson. 



2800. The anterior moiety, including eight plates, of the fourth molar, upper jaw. 



Hunterian. 



2801. The left maxillary bone, with a remnant of the third molar, and with the 

 fourth molar in its fullest state of development. 



The third molar is reduced to the common dentinal base of the last four plates : the fourth 

 molar consists of fourteen plates, of which the six anterior ones have come into use : a por- 

 tion of the formative alveolus of a fifth molar is seen behind it. 



Hunterian. 



2802. The fourth molar, from the right side of the upper jaw of the same skull. 



Hunterian. 



2803. The fourth molar, right side, upper jaw, in its completest state of growth, the 

 first plate not being worn away, and the last plate being completely formed 

 and blended with the rest. 



The total number of plates is sixteen : the fore part of the tooth is supported by distinct 

 fangs : the hind part shows a common widely opened pulp-cavity. 



Presented by Dr. Henderson. 



2804. Part of the germ of the fifth molar, right side, upper jaw, including eleven 

 plates, of which the bases of the first three have coalesced ; these are six inches 

 in length, or vertical extent. Presented by Dr. Henderson. 



3*8 



