302 TAPIROIDA. 



manifested by the last molar tooth, which is fortunately 

 entire. 



The crown of this tooth has a smaller antero-posterior 

 diameter in proportion to its transverse diameter, which 

 chiefly depends on the much smaller size of the third or 

 posterior ridge, as compared with the corresponding tooth 

 in the Cuvierian Lophiodons. 



From the outer extremity of each of the two principal 

 transverse eminences of the last molar, (fig. 104), a 

 ridge is continued obliquely forwards, inwards and down- 

 wards : the anterior one extends to the inner and anterior 

 angle of the base of the crown : the posterior one termi- 

 nates at the middle of the interspace between the two 

 ridges. The anterior principal transverse eminence, al- 

 though it has a trenchant summit, as in the known Lo- 

 phiodons, yet the edge is more concave, the outer and 

 inner extremities rising each into a conical point. The 

 posterior transverse eminence is much lower than the an- 

 terior one, and is tricuspid ; the trenchant margin con- 

 necting the outer and inner points does not extend across 

 the crown parallel with the anterior ridge, as in the Lo- 

 phiodons, but forms an angle posteriorly, the apex being 

 developed into a third point, which is the highest, and 

 from this point the posterior ridge, or talon, extends 

 downwards and outwards upon the back part of the crown 

 at t. 



Thus the crown of the last molar of the present species 

 has the two transverse eminences of a Lophiodon's molar 

 so modified that it supports two pairs of points and one 

 single point, like the last lower molar tooth of the fossil 

 jaw from Lot-et-Garonne, described by Cuvier in the 

 ' Ossemens Fossiles,' 1822, torn. in. p. 404 ; and like that 

 from the Puy en Velay, described in the posthumous 



