DESCRIPTION OF PLATES. 
RiATH LE XCX TT. 
Figs. 1, 1 a, and 1 6.—Rhinoceros platyrhinus. (Fale. and Caut.) 
Mutilated cranium, anterior part, showing 
From the Sewalik hills. 
The specimen is so worn that the 
lateral, upper, and palate surfaces. 
teeth are scarcely distinguishable. The upper surface of the skull is 
broad and flat.—B.M. 
Length of fragment, 17*in. ; height posteriorly, 9°7 in.; height anteriorly, 8° in. ; 
greatest breadth at anterior angles of orbits, 10°6 in.; depth of nasal notch, 6: in. ; 
height of nasal notch anteriorly, 5:5 in. 
In 1847 Dr. Falconer noted that R. platyrhinus partakes of the 
characters of both &. leptorhinus (sic) and R. tichorinus, and on the 9th 
of August, 1860, he made the following note :— 
‘Examined Baker's large skull of the Sewalik Rhinoceros platyrhinus in B.M. 
The molars are in fine condition, six on either side. The last true molar only just 
touched by wear. The last t. m. exactly like Rh. hemitechus, in having a pos- 
terior basal funnel-shaped pit! while the penultimate and antepenultimate t. m. 
and the penultimate and antepenultimate milk m. have each three distinct fossettes, 
as in Rhinoceros tichorhinus! the vertical ridges of the anterior side very well 
pronounced in three valleys. Had two large incisors above and four below: of the 
latter, the two outer big ; the two inner small, as in the existing Indian Rhinoceros.’ 
Figs. 2, 2 a, and 2 b.—Rhinoceros platyrhinus. Fragment showing 
posterior part of cranium, with foramen magnum, occipital condyles 
and crest, portion of right zygomatic arch, and condyle of lower jaw. 
—B.M. 
Length of fragment, 10°6 in.; height 
occipital foramen to summit of occipital 
aboye, 8:4 in.; ditto below, 13:2 in. 
of ditto, 2° in. 
Between extreme points of occip. condyles, 5:3 in. 
of occipital facet from lower margin of 
crest, 12°in. Breadth of occipital facet 
Height of occipital foramen, 2°5in.; breadth 
Least width of 
cranium, 3°3in. Breadth of condyle of lower jaw, 6°7 in.; ditto of ascending ramus, 
6° in. 
3°3 In. 
Fig. 3.—Lhinoceros platyrhinus. 
Between inner angles of glenoid facets, 2°5in. Depth of zygomatic process, 
g g I ys P 
Fragment of skull, upper jaw, 
with molar ridge, and large sub-orbital foramen.—B.M. 
Length of fragment, 13-2in. From root of molar origin of zygoma to sub-orbital 
foramen, 7°5 in. 
veoli, 2°8 in. 
Length of molar series, 10°8 in. 
Greatest breadth of molar al- 
show the two horizontal rami with the | 
remains more or less of seven molars on 
either side, the bases of both canines 
and more or less of the six incisors. | 
The specimen is still much covered with 
matrix; the four premolars on the left 
side show part of their crowns; on the 
right side the first premolar is close to 
the canine; the true molars are well | 
worn; the canine on the left side shows 
a part of the tooth bending outwards, 
but the apex broken off. The other 
bones are so much covered by matrix as 
to be undeterminable. 
No. 318. Sus ? Fragment com- 
prising the posterior part of upper max- 
illa right side, containing the two last 
teeth in situ; the penultimate is well 
worn, showing a very complex pattern 
of crown ; the last molar is half worn. 
| No. 319. Sus——? Fragment of 
| lower jaw, right side, comprising pos- 
terior part of horizontal ramus, broken 
across horizontally near the base of the 
| teeth, and containing the last two mo- 
| lars, the penuliimate well worn with 
| very flexuous enamel ; the Jast molar in 
+ germ and of very large size. 
| No. 320. Mutilated fragment com- 
prising part of the last true molar, much 
| broken and cemented with matrix. 
No. 321. Fragment comprising the 
posterior part of horizontal ramus lower 
| jaw right side, containing the two last 
teeth im situ; they are in the same con- 
| dition of wear as No. 319, but consi- 
derably smaller. 
No. 54 (from Perim Island). Lower 
| jaw, left side, fragment containing 
merely the last molar of Sus Hysudricus ? 
G 
