ELEPHANT AND MASTODON. 



93 



wtich is the third milk molar corresponding with the Dax 

 tooth, is in an advanced stage of wear, the ridges of the crown 

 being ground down into three disc surfaces. ISTo back talon 

 is distinguishable ; if originally present, it has merged into 

 the wear of the last ridge. This tooth measures 3'15 inches 

 long, by 2 of width in front, and 1-75 behind, narrowing a 

 little towards the posterior end. It is figured by M. de 

 Blainville.^ The same collection possesses another detached 

 specimen from M. Lartet, of exactly the same size, but less 

 worn, which shows three distinct ridges and a small subordi- 

 nate talon. The grinder described and figured by Von Meyer, 

 in his memoir on the fossil remains of Georgensmiind,^ appears 

 to furnish another example of the third milk molar of the 

 upper jaw, left side, of this species. The crown is divided 

 into three ridges, with a small posterior talon. It corres- 

 ponds closely to the Gers specimens in dimensions, being 

 three inches long by two in width. Von Meyer describes 

 this tooth as the second milk molar of M. angustidens, but the 

 size woidd seem to be conclusive against the correctness of 

 this determination. Kaup compares it to the third upper 

 molar of his M. longirostris.^ 



With regard to the first and second upper milk molars, 

 neither of these teeth having yet been observed in situ in the 

 jaw, we are unable to refer with confidence to any specimens 

 for their characters. But we are inclined to regard the tooth 

 described by Von Meyer'' (PI. I. fig. 4) as representing the penul- 

 timate, or second, and fig. 2 of the same plate as the first. The 

 former measures 2-2 inches by 1-4, and is composed of three 

 ridges, which are so far advanced in wear as to furnish no good 

 diagnostic characters. Von Meyer refers it with doubt to the 

 last milk molar of the lower jaw, while Knuj) considers it to 

 be the second upper of the left side of his M. longirostris.^ 

 The specimen ^ here regarded as the antepenultimate, or first 

 milk molar, has a square crown composed of four points. It 

 measures 1-6 inches in length by 1-4 in width, resembling 

 closely in form and dimensions the small Simorre specimen 

 figured by Cuvier,^ which is also about 1-6 inches long by 

 1-4 wide, and is regarded by M. de Blainville as the first 

 upper molar of M. angustidens. This eminent palaeonto- 

 logist assigns the same place to several other specimens 

 from M. Lartet and others ; but such of these figures as are 

 susceptible of exact determination, from their being found 

 in situ in the jaw, are derived from Auvergne and Eppel- 



' Ost^ographie, pi. xv. fig. 3 c sup. 



2 P. 38, tab. ii. fig. 7. 



' Oss. Foss. de Darmst. p. 81. 



■* Georgens. p. 38, tab. i. fig. 4. 



* Oss. Foss. de Darmst. pt. iv. p. 73. 

 ^ Fig. 2 of Von Meyer's plate. 

 ' Diver. Mast. pi. i. fig. 2. 



