140 



are displayed ; the entire tooth includes twelve plates. This molar is 

 the third in order of succession. 



From the drift or pleistocene beds at Hinton, Somesetshire. 



Hunterian. 



585 1 . A corresponding upper molar of a young Asiatic Elephant : it is of equal 

 breadth, but greater length, and includes eleven lamellar divisions of the 

 crown, five of which have come into use. Hunterian. 



586. A portion of the left ramus of the lower jaw of the Mammoth with 

 one molar complete and part of another, which had not come into use. 

 The grinding surface of the anterior molar, which is five inches in length, 

 includes the summits of fourteen plates : the posterior of these presents 

 the abraded tips of seven mammillary processes ; the next plate in 

 advance is worn down to three divisions, the middle being much broader 

 than the two lateral ones ; the three plates in advance of this have the 

 three divisions of more equal breadth ; they are blended together into 

 one transverse depression in the anterior lamella. The base of the tooth 

 is divided into five fangs, most of which are bifid. This molar is the 

 fourth in the order of succession. The remains of the socket show the 

 antero-posterior extent of the fifth molar, of which only seven of the 

 anterior divisions of the crown are preserved, connected together by the 

 cement. 



From the pleistocene formations near the Ohio, North America. 



Purchased. 



587- The posterior worn-down extremity of the fifth upper molar of the Mam- 

 moth ; the transverse plates are almost continuous along their middle 

 rhomboidal dilatations. 



From the drift or pleistocene beds of Cambridge. Purchased. 



588. The entire sixth upper molar of apparently the same Mammoth. The 

 grinding surface of the crown, which is eight inches three lines in length, 

 exposes the summits of fifteen transverse plates, the two anterior ones 

 being worn down to their common uniting base. 



From the drift or pleistocene beds of Cambridge. Purchased. 



