294 MR. BUSK ON THE REMAINS OF 
making a difference of nearly an inch. A series of discoloured bands upon the surface 
of the cement of the outer side near the top, disposed concentrically, have been caused 
by this distorted wear. The three hindmost ridges are intact, and, instead of being 
vertical, they are in a certain measure retrofracted, the convexity being directed 
forwards—a character which is commonly presented by the hindmost of the true molars 
in the Elephants. The posterior talon appears to have consisted of a single flattened 
digitation, the back plate of which has been removed by a fracture. This circumstance 
has deprived us of any direct evidence as to the presence or absence of a disk of 
pressure behind; but the characters presented by the specimen, regarded in the aggre- 
gate, are consistent only with determining it to have been a penultimate or last true 
molar, probably the latter. The dimensions are :— 
in. 
Extreme length of fragment .......0:2.....000re+006 3°3 
Wadthratantentor platen. -.cecresssscescen- ec ee 1:35 
Widths GH on vcecs cn dae oes cuzoscaees once ote um aey os 1:2 
Extreme eight Ol CrOWiscy acai sictuedespraseciis sn: 2°9 
‘These dimensions are comparatively larger than those yielded by fig. 12; but the 
difference is not greater than may: be: fairly ‘attributed to distinct individuals, or 
difference of sex. The -distortion:in the -grinding-plane, noticed above, is rarely, if 
eyer, seen in molars of the milk or adolescent stage, but is occasionally met with, 
variously modified, in teeth belonging to the period of old age. 
‘A still more perfect specimen is represented, top and side aspects, by figs. 11 and 11 a, 
which is inferred to be another example of a last lower molar of the left side, in a 
different stage of wear from the preceding two. What remains of the crown consists of 
ten ridges and a posterior talon: All of these are more or less affected by wear. ‘The 
seven anterior ridges had been ground down into transverse disks, of which the two 
first are confluent into a uniform surface, from which all trace of enamel has dis- 
appeared; and they are confluent also by a narrow isthmus with the third disk. The 
disks correspond in form exactly with those of the teeth already described, being broad 
in the antero-posterior direction, with a slight tendency to sharply angular expansion in 
the middle, which is more or less developed upon the fourth, fifth, and sixth ridges. 
The enamel edges in contact with the ivory depressions of the disks are straight, and 
entirely free from any tendency to plication or crimping, this being clearly a distinctive 
character of the species. The ridges, besides their considerable breadth, are separated 
by rather wide intervals of cement: this is well shown on the side aspect of fig. 11 a. 
The posterior talon forms a prominent splent, consisting of about a couple of digita- 
tions. - All the fangs have been removed by fracture close to the base. The crown 
surface in front has been ground down to the level of the fangs; and there is no trace 
remaining of the large anterior fang, or of the portion of the crown supported by it, 
which must have borne at least two additional ridges, which .would give a total of 
