GEOLOGICAL SOCIETY. 



53 



specific differences, not to speak of generic distinction, 

 The jaw bones, together with the various teeth con- 

 nected with them, or separately existing ; display no 

 peculiarities or varieties of structure, but such as are 

 found to exist in similar portions of the skeletons of any 

 other species of animal recent or fossil, provided speci- 

 mens are selected from individuals of different sexes, 

 and different ages. No peculiarities or differences, in 

 fine, worthy of notice, not fully described by Cuvier, in 

 his Ossemens Fossiles, where he has given seventeen 

 figures of the teeth and jaws of this species, and which 

 are thus noticed in vol. i. p. 226, of his last edition : — 

 "The differences of teeth of the 'Grand Mas to donte^ 

 consist principally in the number of their points, and in 

 their length and breadth. 



" I recognize three kinds of them : those nearly 

 square, with three pairs of points. 



"Rectangular, with four pairs of points. Others 

 still longer, rather contracted posteriorly, with five 

 pairs of points, and an odd spur. 



66 The first are generally found among those most 

 used 5 I have observed many about half used, and seve- 

 ral others worn down even to the neck of the tooth. 



" The latter, on the contrary, are very rarely used, 

 and are almost always, their posterior parts at least, en- 

 tire. 



H This circumstance at once indicates their relative 

 position. The teeth with six points are anterior, and 

 are the first to appear ; those with eight and with ten 



