498 



surface of the skull also inclines forwards, from below, in a much greater degree. Seven 

 plates of the upper and eight of the lower molar in use on each side of both jaws have been 

 abraded: the tusks are long, slender, slightly curved, and sharp-pointed. 



Mus. Brookes. 



2846. The lower jaw of a larger African Elephant, from which all the teeth have 

 been removed, except the anterior molar on the left side. 



Of this tooth the last seven plates and the common dentinal base of two or three anterior 



plates have been exposed by use. 



Hunterian. 



2847. A similar-sized lower jaw of an African Elephant. 



The teeth have been removed from the right ramus, and the remnant of the anterior tooth 

 , of the left ramus. Seven plates of the succeeding molar have been in use, and two others are 



still covered by the cement ; behind this tooth appears the gubernacular orifice of the forma- 

 tive socket of the succeeding molar. 



Hunterian. 



2848. The last left upper molar of the African Elephant. 



The constituent plates are fewer and thicker than in the Asiatic species, and are dilated in 

 the middle, which gives a lozenge-shape to the enamelled contour of their abraded summits : 

 these have been so exposed in the six anterior plates of the present molar tooth ; three other 

 unworn plates succeed these, and one or more posterior ones are wanting in the present 

 molar. 



Hunterian. 



2849. A constituent plate of the molar of an African Elephant, with one of the pair 

 of fangs which are developed from the basal interspace of two plates. 



In this specimen is well shown the thickness of the enamel surrounding the dentinal body 

 of the plate. 



Presented by Sir Everard Home, Bart., V.P.E.S. 



2850. Three of the constituent plates of the same molar tooth, showing the thickness 

 of the masses of cement intervening between the narrower parts of the plates. 



Presented by Sir Everard Home, Bart., F.P.E.S. 



2851. A portion of the germ of an upper molar of an African Elephant. 



It includes five plates, which have become confluent at their bases and have their summits 

 covered by a very thick crust of cement. Only the first plate has begun to be worn. 



Hunterian. 



