18 
INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
Sivalensis,” pi. LX VII. figs. 5, 5a, 1 the left half of the palate being also figured on 
a scale of one-half in pi. LXII. fig. 15. 2 The length of the space occupied by the 
three true molars is 2 - 6, 3 the interval between the canine and the hinder border of 
m. 3 5-3, and the antero-posterior diameter of the canine 0*7 inches. The charac- 
teristic convex profile and great vertical height of the cranium are well shown in this 
specimen. 4 The middle part of a very old cranium from the Punjab in the Indian 
Museum, of which the left dentition is represented in pi. VI. fig. 2, agrees very 
closely with this specimen. The teeth are very much worn, and the premolars 
are broken ; the three true molars occupy a space of 2 - 46 inches. The dimenions 
of these two specimens differ very greatly from those of the female cranium of 
M. dissimilis represented in pi. V. fig. 2. 
Mandible . — The left ramus of the mandible of a male figured in the “ Fauna 
Antiqua Sivalensis,” pi. LXVII. figs. 8, 8a 5 is refigured on a larger scale in pi. VI. 
fig. 4. The inner side of the specimen is not cleared from matrix, and the necessary 
foreshortening of the canine (c.) does not give a good idea of the large size of this 
tooth. In relative dimensions this specimen agrees precisely with the male cranium 
represented in fig. 1, the length of the space occupied by the three true molars being 
2*7, the interval between the canine and the hinder border of m. 3 6*4, and the 
antero-posterior diameter of the canine 1T8 inches. The remarkable difference 
between this specimen and the male mandible of M. dissimilis represented in pi. V. 
fig. 3 will be apparent from a comparison of the figures and dimensions. 
In plate VI. fig. 5 a larger view is given of a female mandibular ramus figured 
in the “Fauna Antiqua Sivalensis,” pi. LXVII. figs. 7, 7a. 6 The specimen belongs 
to the right side, and shows the last true molar in a half- worn condition, the bases of 
the preceding cheek-teeth, and a section of the canine (c.). The interval between 
the latter and the hinder border of m. 3 seems to have been nearly the same as in 
the male specimen, but the antero-posterior diameter of the base of the canine is only 
0-78 inch. 
Distribution . — Assuming that the specimen represented in pi. VI. fig. 2 is rightly 
referred to the present species, the range of the latter will have extended from the 
Siwalik Hills to the Punjab. 
Species 3. Merycopotamus pusillus, nobis. 6 
The characteristic features of the third upper true molar on which this small 
species is founded have been already described in the preceding volume of this work 
(pp. XII.-XIII). 
i “ Cat. Foss. Mam. Brit.’ pt. II. p. 212. No. 16552. 2 Wrongly entered as the lower jaw in the description of the plate. 
3 Owing to the worn condition of m. 1 in the male cranium the length of the molar series is abnormally short. 
4 See the figures in the “ F. A. S.” 6 See “ Cat. Foss. Mamm. Brit. Mus.” pt. II. p. 212. No. 18407. 
6 “ Cat. Foss. Mamm. Brit. Mus.” pt. II. p. 212. No. 15349. 
