FAUNA OF THE KARNUL OAVES. 
49 
of an allied form in tlie reputed pliocene of Algiers is apparently afforded by S. 
phacochoeroides , Thomas, 1 in which the third lower true molar agrees very closely in 
size and structure with the specimen represented in pi. IX. fig. 4, although the 
development of lateral accessory columns in the talon is somewhat greater. 
Sus karnuliensis, n. sp. nobis. 
Definition . — This provisional species agrees in size with S. falconeri, but in the 
general structure of the molars with S. cristatus, although some specimens of these 
teeth approach those of certain examples of the former. 
Loiver molar. — The much-worn third left lower true molar from bed Cd in the 
Cathedral represented in pi. IX. fig. 3, and the somewhat less-worn tooth of the 
opposite side from bed Cb represented in fig. 8 indicate a species allied in the 
structure of these teeth to N. cristatus-, but of considerably larger size. It appears, 
indeed, very difficult to detect any structural difference between these teeth and those 
specimens of the third lower molars of that species in which the talon ( b , c, d ) is of 
the most complex type. Compared with the corresponding tooth of the male of the 
Siwalik S. falconeri (supra, vol. III. pi. VII. fig. 2) these teeth agree very closely in 
length, but differ by their inferior width and less elongation of the main columns, 
so that the interval between the anterior extremity and the point a is very much 
smaller. This difference is still more marked if the Karnul teeth be compared with 
m.3 of the female of the Siwalik species (vol. III. pi. VII. fig. 1), when it will be 
seen that in the absolutely smaller Siwalik tooth the above-mentioned interval is 
greater than in the Karnul teeth. In one male mandible of S. falconeri (B.M. No. 
M. 201 2 2 ) the third lower true molar is very like the Karnul specimen represented in 
fig. 3 ; the interval between the anterior border and a being but very slightly smaller. 
Upper molars. — The well-worn third right upper true molar from bed Cd in the 
Cathedral represented in pi. IX. fig. 6, and the almost unworn corresponding tooth of 
the opposite side from the same bed represented in fig. 9, agree in relative size with 
the lower molars. Both specimens exhibit great complexity in the development of 
the talon (a, b, c ), and also of the lateral accessory columns ; in fig. 9 there is a supple- 
mental line of small tubercles behind c which is wanting in fig. 6. Beyond the 
circumstance that the accessory columns appear more numerous than in m.3 of S. 
cristatus (fig. 7) these teeth do not appear to differ structurally from examples of that 
species in which the talon of that tooth is unusually largely developed. Compared 
with the two specimens of m.3 of S. falconeri represented in vol. III. pi. VII. figs, 
o, 7, the Karnul teeth differ by their greater relative width, the shorter interval 
between the anterior extremity and the point a, and the lesser antero-posterior 
elongation of the discs of dentine formed by the abrasion of the main columns. In 
one male cranium of S. falconeri (B.M. No. 15316 3 ) m.3 is, however, wider than 
usual, and thereby approaches the Karnul teeth, although the interval between a and 
1 ‘ Mem. Soc. Geol. France,’ ser. 3. vol. III. pt. 2, p. 10. pi. X, fig. 1 (1885). 
2 See “ Cat. Foss. Mamm. Brit. Mus.” pt. II. p. 264. 3 Ibid. p. 263. 
