80 FAUNA ANTIQUA SIVALENSIS. 
PLATE LX: 
Fig. 1.—H. Sivalensis. Fragment of posterior portion of skull ; 
upper surface; showing occipital ridge and left zygomatic arch.—B.M. 
Fig. 1 a.—Under surface of same specimen. 
Fig. 1 b.—Lateral view of same specimen. 
Fig. 2.—H. Sivalensis. Fine specimen of cranium, with occipital 
ridge, and nasal sutures distinct, and both zygomatic arches intact.— 
B.M. 
Fig. 2. a.—Lateral view of same specimen, showing lower jaw 7 
situ. The slight elevation of the orbit above the plane of the frontal 
is also seen. 
Fig. 2 b.—Posterior view of same specimen, showing occipital ridge, 
condyles, and foramen magnum. 
Fig. 3.—H. Sivalensis. Fragment of posterior part of another skull 
with both zygomatic arches.—B.M. 
Fig. 3a.—Palatine view of same specimen, showing posterior and 
part of middle molar, on either side. 
Fig. 3 6.—Lateral view of same specimen. 
Fig. 3 c.—Occipital, or posterior, view of same specimen. 
o 
Fie. 4.—H. Sivalensis. Another specimen of cranium deficient in 
muzzle and right zygomatic arch ; upper surface. : 
o 
Fig. 4 a.—Palatine view of same specimen, showing three molars and 
one premolar, on either side, much worn. 
Fig. 4 b.—Lateral view of same specimen, showing the slight ele- 
vation of the orbit. 
Fig. 4 c.—Posterior, or occipital, view of same specimen. 
Puate LXI. 
Fig. 1.—H. Sivalensis. Fragment of young skull, showing muzzle ; 
under surface showing molars and canines and alveoli of premolars.— 
B.M. 
Fig. 1 a—Upper surface of same specimen. 
Fig. 1 d.—Same specimen; lateral view. 
Fig. 2.—Hippopotamus Sivalensis. Skull, imperfect; palatal view. 
—B.M. 
Fig. 2 a.—Lateral view of same specimen. 
Fig. 8.—H. Sivalensis. Fragment of lower jaw, right side, viewed 
from above. The molar line is seen to curve outwards, both in front 
and behind, as in the upper jaw. 
Fig. 3 a.—Lateral view of same fragment. The condyle, coronoid 
process, and the descending process are broken off. The lower margin 
is straight. 
Figs. 4 and 4. a.—H. Sivalensis. Fragment of lower jaw, upper and 
lateral surface. The alveolar ridge on right side is very perfect, and 
