70—36 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
the whole talon indeed exceeding the length of the hinder main columns. The 
complexity of the jiattern on the worn surface is produced by the number and large 
size of the accessory columns (which completely block the lateral valleys) and by tlie 
vertical grooving of the enamel ; the latter character causing the section of the 
enamel in certain stages of wear to present a folded, or crenulated, appearance. 
This structure is present to a certain extent in the molars of most pigs, but is never 
so strongly developed as in the present form. In the elongated m. 3 , and the complex 
pattern on its crown, the cranium is widely different from S. harhatus. 
Other tspecimens . — In the memoir cited Baker and Durand described an imperfect 
cranium of a male of which they figured the left dentition* : that specimen seems to 
agree in all respects with those described above, and belonged to an old individual, 
the first and second molars being completely worn down, and their united length 
much less than that of m- 3 ; the latter tooth is rather larger in all its dimensions 
than that of the female skull, but exhibits the same complexity of structure. The 
subsequent history of this specimen is unknown. In the Science and Art Museum, 
Dublin, there is the middle portion of a crushed skull (No. C. 31), of which the 
dentition of the left side is represented in plate XLIV., fig. 4, of Baker and 
Durand’s memoir. This specimen appears to agree exactly with the typical male 
skull, although the crush to which it has been subjected makes it a])pear relatively 
higher : the teeth are well worn. The dimensions of its cheek-teeth are as follows, 
vis .: — 
Length of three true molars .... 3‘6 Length of m. 3 2'0 
,, ,, m. 2 10 Width ,,,,,, I'l 
Width ,,,,,, 0-9 
In the British Museum there is the palate of a younger individual in which m. 3 
has not come into wear : the left dentition of this specimen is represented in plate 
XLIV., fig. 2, of Baker and Durand’s memoir. From its little-worn condition, and 
consequent absence of pressure by m, 3 , the second true molar is much longer in this 
specimen than in any of those previously described ; the united length of this and 
the preceding tooth equalling that of : m, 2 very clearly exhibits the characteristic 
complex pattern of the masticating sui’face. The dimensions of the teeth of this 
specimen are as follows, vis .: — 
Length of pm. 4 
0-49 
Length of m. 2 
1-29 
Width ,,,,,, 
0-6 
Width ,,,,,,. 
0-84 
Length ,, m. 1 
0-74 
Length ,, ,, 3 . 
2-03 
Width 
0-66 
Width ,,,,,, . . 
0-97 
The palate of a still younger individual in the British Museum (represented in 
“ F.A.S.,” pi. LXXI., fig. 14, and in pi. XLIV., fig. 1, of Baker and Durand’s 
memoir-), in which pi- 3 is still in alveola, exhibits precisely similar characters, but the 
dimensions of m. 2 are only 1 ’2 and 0‘83. The greater portion of a young skull in 
the same collection, represented in plate LXX., figs. 4, 4a, 4b, of the “F.A.S.,” 
1 Plate XLIV., fig. 5. 
2 This figure is reproduced on a reduced scale by De Blainville (“ Osteographie,” Genus Sus, pi. IX.), under the name of 
8. sivalensis. 
