62 



the measurements and the internal capacity, this last being 282 

 cubic inches in one, and 287 in the other ; the cranium of an 

 African elephant, in the Society's Cabinet, measured 338 inches. 

 The next specimen noticed was the lower jaw of a young indi- 

 vidual, showing the alveoli for the inferior tusks, 20 lines in 

 depth, and about f of an inch in diameter at the outlet. 



Prof. Owen states that in the M. giganieus the first and second 

 molars have two ridges, the third and fourth have three, and the 

 last has four or five, {Annals of Nat. Hist. vol. xi.) ; and it may be 

 inferred that he regards five as the whole number of teeth. Now, 

 the present collection demonstrates that, in the lower jaw at least, 

 the true number is six, the two first having two perfect ridges, the 

 three next having three, and the last four, with a marked talon, or 

 single point at the posterior extremity. The lower jaw of the 

 calf, with the three others belonging to the crania above men- 

 tioned and to the skeleton, form a series in which the correspond- 

 ing teeth are satisfactorily made out, and, as the calf had never 

 shed one, and the skeleton had evidently got its last, we may be 

 sure that we have the whole number. In the calf there are three 

 teeth, and one in the socket, the first measuring \^ inches in 

 length and | of an inch transversely ; with regard to the second 

 tooth, it should be stated that, besides the two proper ridges, there 

 is a third which should perhaps be included, though imperfectly 

 developed, and having no corresponding fang. The youngest 

 cranium has two teeth with three ridges, and one in the sockets, 

 the oldest three, with three ridges on the right side, and one in the 

 socket, the left anterior having fallen out ; and the skeleton one 

 with three ridges, and one with four and a talon, this last tooth 

 being 6f- inches in length. The upper molars correspond with 

 those in the lower jaw, so far as observed, but as the cranium of 

 the calf was not procured, the existence of the two first teeth can 

 only be inferred. Amongst the loose bones which make up the 

 remainder of this collection, is a three-ridged tooth, evidently 

 from the socket, as it is not at all worn, showing the formation of 

 the crown before the fangs have begun to develop. Two styloid 

 bones arc also seen, about 8 inches in length, and these have never 

 before been observed, so far as Dr. J. is aware. 



A very large tooth of a Mastodon^ brought from Burmah, 

 now in the Society's Collection, has seven distinct ridges and a 

 talon. 



