493 



2811. The left ramus of the lower jaw of a young Elephant, showing a similar stage 

 of dentition. 



The inner wall of the socket of the first molar has been removed, to show the long base of 

 its two diverging fangs : the germ of the second molar is similarly exposed. 



Presented by Dr. Henderson. 



2812. The second molar, right side, lower jaw. 



It consists of eight plates, and a few accessory tubercles behind the last : the bases of the 

 six anterior plates are confluent ; the apices of the first and second have been in use, and 

 these, with the third, are supported by a distinct root : its length (antero-posterior diameter) 

 is three inches. 



Hunterian. 



2813. The left ramus of the lower jaw of a young Elephant, in which the first molar 

 has been shed and its socket obliterated, the second molar reduced to the com- 

 mon dentinal base of the last three or four plates, and the third molar is in a 

 full state of development, with nine of the fifteen plates in use. 



The inner wall of the sockets has been removed to show the much-absorbed root of the 

 second molar, the commencing roots of the third molar, and eight plates of the fourth molar 

 in its formative alveolus : only the first and second of these plates have coalesced at their base. 

 The length, of the third molar is 5 inches 4 lines. The length of the jaw is 15 inches. 



Hunterian. 



2814. The third molar, right side, lower jaw. 



It consists of twelve plates, and had probably one or two more, which have been worn away 

 from the anterior end : all the remaining plates, save the last, have come into use. The an- 

 terior part of the tooth is supported by two distinct bifurcate fangs. The length of this tooth 

 is 5 inches 4 lines ; its greatest depth, 4 inches 4 lines. 



Presented by Dr. Henderson. 



2815. The corresponding tooth from the left side of the same lower jaw. 



The anterior fang has been broken away. 



Presented by Dr. Henderson. 



2816. A portion of the left ramus of the lower jaw ; containing the remains of the 

 second, the whole of the third, and part of the formative socket of the fourth 

 molar. 



The third molar consists of thirteen plates, of which the six anterior have come into use. 



Hunterian. 



