492 



2805. The nine anterior plates of the corresponding molar, from the left side of the 

 same jaw. 



The bases of the first and second are confluent, and those of the third and fourth have 

 coalesced on the right side. 



Presented by Dr. Henderson. 

 \ 



2806. A fifth molar, left side, upper jaw. 



A few of the anterior plates, probably three, have been worn down to their common uniting 

 base of dentine, which presents an even polished surface by attrition : the sixteen other plates 

 are confluent at their bases, and, with the exception of the last six, they are supported by 

 distinct roots arranged in pairs. 



Hunterian. 



2807. The fifth molar, right side, upper jaw, of which all but the last thirteen plates 

 have been worn away. Hunterian. 



2808. The sixth, and probably last molar, left side, upper jaw. 



It consists of twenty-two plates, and some appear to be wanting from the hinder end, where 

 they are not confluent, and have been fractured : the eight anterior plates have come into 

 use, and these are supported by distinct fangs. The most complete unworn plate is 8 inches 

 in length. 



Presented by Mrs. Robinson. 



2809. The last molar, left side, upper jaw, in which the hinder part of the tooth is 

 folded forwards, as it were, upon the inner concavity. 



It consists of from twenty-six to thirty plates, but the number is not readily definable from 

 the distorted character of the tooth: ten of the plates have come into use, and fangs are 

 developed from their confluent bases. 



Hunterian. 



2810. The lower jaw of a very young Elephant, in which the first molar has cut the 

 gum, and the crown of the second may be seen in its formative alveolus. 



The first molar consists of four plates, with accessory tubercles to the first and last : the 

 second molar consists of eight plates, of which the first four have become confluent at their 

 base : portions of a few of the plates of the third molar may be seen in the alveolus, behind 

 that of the second, with which it communicates by a large vacuity in the middle of the 

 septum. The length of this jaw, in a straight line from the angle to the symphysis, is 

 9 inches. 



Presented by Dr. Henderson. 



