94 FAUNA ANTIQUA SIVALENSIS. 



sheim specimens of M. longirostris. The same remark applies 

 to M. de Blainville's figures and descriptions of the second 

 m.ilk molar in both jaws. 



Of the inferior milk molars, the two anterior, like the 

 upper, have not yet been found in situ, and the specimens 

 which have been assigned to them are, in consequence, in a 

 great measure conjectural determinations. The first was 

 probably a simple tooth consistmg of a j)air of cusps ; and 

 the second, reasoning from the analogy of the same tooth in 

 the nearly-allied M. Andium, was probably three-ridged. The 

 third is represented by the ' dent de Saxe,' ' upon which 

 Cuvier founded his nominal species of M. minutws, but which 

 M. de Blainville with reason attributes to if. angustidens. 

 It is of the left side of the lower jaw ; the crown is divided 

 into three ridges, each composed of two pairs of confluent 

 points, with a well-developed back talon of two tubercles, and 

 one or two subordinate tubercles in the spaces between the 

 ridges. The dimensions of this specimen are 3*25 inches 

 long, by 1-25 of width in front, and 1-65 behind. An imworn 

 germ, of unknown origin, in the British Museum, of the 

 same size as the Saxon tooth, and exactly resembling it 

 in the ternary division and form of the crown ridges, fur- 

 nishes another example of the third inferior molar. M. 

 de Blainville^ attribiites the same place to a worn three- 

 ridged tooth, from the collection of M. Lartet, found near 

 Sansans. 



We have seen that the premolars, of which two are deve- 

 loped in Dinotherium, appear to be entirely suppressed in M. 

 Ohioticus. But there is no doubt about the presence of one 

 in the upper jaw of M. angustidens. A beautiful illustration 

 of this tooth is fm-nished by the Dax specimen, previotisly 

 referred to. As figured in the ' Ossemens Fossiles,'^ it is 

 shown as a germ of a square form and composed of four 

 points. It is proved to be a premolar, and to be protruded 

 vertically in the ordinary manner, by being unworn, while 

 the third milk molar behind it has the three ridges well 

 affected by wear. This circumstance is clearly indicated by 

 Cuvier in his description of the specimen.'' Von Meyer refers 

 to the same tooth the Georgensmlind specimen represented 

 in tab. 1, fig. 1, of his Memoir, which resembles the Dax 

 specimen in form, and in the crown being composed of four 

 points ; it measures about 1*6 inches square. This upper 

 premolar, as has been pointed out by Professor Owen, takes 

 the place of the second milk molar ; it therefore represents 

 the penultimate of this series. There is no evidence that the 



> Oss. Foss. pi. ii. fig. 11. I ' PI. iii. fig. 2 a, b. 



2 Loc. cit. pi. XT. fig. 3 J. 1 ' Ossemens Fossiles, torn. i. p. 256. 



