DESCRIPTION OF PLATES. 79 
Fig. 66.—H. Palwindicus. Same specimen viewed from above. 
Fig. 7.—H. Paleindicus. Lower end of shaft, with articulating 
extremity, of femur, posterior view.—B.M. 
Fig. 7 a.—H. Palwindicus. Posterior view of same specimen. 
Fig. 7 b.-—H. Paleindicus. Same specimen viewed from below. 
Figs. 8, 8a, and 8b.—H. Paleindicus. Upper end of tibia. Anterior, 
posterior, and upper views.—B.M. 
Bias. 9. 9a, 90, and 9c.—H. Paleindicus. Entire tibia. Anterior, 
posterior, upper and lower views.—B.M. 
Figs. 10, 10 a, 10, and 10 c.—H. Paleindicus. Entire radius. An- 
terior, posterior, upper and lower views.—B.M. 
Prats LEX. 
Fig. 1.—Aippopotamus (Hexaprotodon) Sivalensis. (Fale. and Caut.) 
Fine specimen of entire skull from the Sewalik hills. Upper surface, 
showing the zygomatic arches, sagittal crest, and muzzle. The hollow 
between the muzzle and the zygomatic arch is remarkably abrupt, and 
the occipital crest is very elevated.—B.M. 
Fig. 1 a—H. Sivalensis. Palatine view of same specimen, showing 
the three molars and four premolars, well ground, and the alveoli of 
the canines and s’x incisors. The line of molars is seen to curve 
slightly outwards towards the front and also behind. ‘The space be- 
tween the most advanced molar and the canine is much shorter than 
in the existing animal. There is a deep fissure in front between the 
incisive bones. 
Fig. 1b.—H. Sivalensis. Lateral view. The orbit projects but 
slightly above the plane of the frontal, and in this respect the species 
contrasts remarkably with that of the H. Palwindicus, Plate LVI. fig. 
la, and Plate LVIII. fig. 4a. The orbit is also much more advanced 
than in the existing Hippopotamus, and this accounts for the abrupt 
hollow between the muzzle and zygomatic arch. The incisors, drawn 
in outline, are seen to curve downwards. 
Fig. 2.—H. Sivalensis. Another specimen of cranium, upper surface. 
The right zygomatic arch is imperfect; the nasal sutures are more dis- 
tinct than in fig. 1—B.M. 
Fig. 2a.—H. Sivalensis. Palate view of same specimen, showing 
three molars and four premolars on either side. Posteriorly the molar 
lines curve less out than in fig. 1, and the teeth are somewhat less 
worn. 
Fig. 3.—H. Sivalensis. Another specimen of cranium, upper sur- 
face. Both zygomatic arches are imperfect.—B.M. 
Fig. 3a.—H. Sivalensis. Palate view of same specimen, showing 
three molars and four premolars on either side. The teeth are less 
ground than in figs. 1 and 2. The trefoil wear of the coronals of each 
pair of collines is well seen. 
Fr 2 
