DESCRIPTION OF PLATES. 7 
specimen agrees in age and characters with that shown in figs. 1 and 2, 
except that the third milk molar has 8 principal ridges, with a front 
and back heel, instead of 7 as in the other.—B.M. 
Length of second milk molar, 2°2 in. 
of plates about 4. 
between second teeth, 1°2 in. 
Width of second milk molar, 1°6 in. 
Length of third milk molar, 4°3 in. 
Between third, 2:1 in.! 
No. 
Width, 2°in. Interval 
Figs 4, 5, and 6.—Elephas planifrons (Fale. and Caut.), from the 
Sewalik hills. 
third milk, and first or antepenultimate true molar. 
Portion of cranium with palate containing premolar, 
The left pre- 
molar consists of three principal ridges and an indistinct front and 
back ridge. 
and aft. 
untouched by wear. 
Their direction is so oblique that they point nearly fore 
This little tooth is nearly globular in form and is quite 
The crown is composed of a number of tubercles 
irregularly huddled together, somewhat in a botryoidal manner, and 
presenting no distinct indication of transverse ridges. 
A_ hollow filled 
with matrix is seen on the right side, where the corresponding tooth 
had dropped out. 
The third milk molar is very broad, all the six 
ridges worn, enamel thick. The first true molar is entirely in germ. 
—B.M. 
Length of premolar, 1:2 in. 
of third milk molar, 4: in. 
front ridge. 
at fourth ridge, 3: in. 
2°8 in.? 
1 Notes by Dr. Falconer of other speci- 
mens of #, Hysudricus, not figured. 
1. A small head with second and third 
milk molars, of exactly the same age as 
the small head, Plate vi. fig. 3, and 
Plate vii. fig. 1, if anything younger, 
as only the first ridge is touched by wear. 
Shows the plates of the second milk molar 
better than any other. 
Length of second left milk molar, 
2°5in.; width, 16in.; has 5 distinct 
ridges anda heel. Length of third milk 
molar, 4:1 in.; width, 2°in.; has 7 main 
ridges with a large front ridge and large 
heel, or 9 good plates. Interval between 
teeth infront, 1°6in.; between last teeth 
behind, 2°1 in. 
2. Another imperfect head of young 
E. Hysudricus, of same age as fig. 1 of 
Plate vi. Has second and third milk 
molars in use and first true molar in 
germ. The second milk molar is well 
worn, the third has the five first plates 
worn. 
Length of second milk molar, 2°3 in. ; 
‘width, 1:7 in. ; number of plates 5, and a 
heel. Length of third milk molar, 4°6 in. ; 
width, 2°3in.; number of plates 8, with 
front and heel plates in addition. Height 
of sixth plate, 2°6 in. 
3. Fragment of a very large cranium 
comparatively as regards the age of the 
teeth. Contains the third milk molar 
Width, 1:1 in. 
Width, 2-4 in. Number of ridges 6, with a heel and 
Length of first true molar, 5°65 in. 
Number of plates 7, with front and back ridges. 
between third milk molars in front, 2°3 in. 
Height of crown, °8 in. Length 
Width, 2°7 in. Greatest height 
Interval 
Ditto at niche of palate behind, 
and first true molar. The third milk 
molar is well worn, with 7 ridges and a 
back and front ridge; the two front ridges 
worn. The tooth is very broad, broader 
even than the third milk molar of FZ. 
planifrons (Plate vi. figs. 4 and 5); 
the enamel ig thin, and finely crimped. 
The first true molar is equally remarkable 
in being broad and short and in having 
few ridges. The first four ridges are 
touched by wear. It is proved to be EZ. 
Hysudricus by the great size of the nasal 
opening, and the downward direction of 
the rami. 
Length of third milk molar, left side, 
3°8in.; width, 2°6in. Length of first 
true molar, 6*in.; width, 2°6 in. ; number 
of plates 8, with a large front ridge and 
a very large heel. Interval between the 
front teeth on either side, 1:6 in.; be- 
hind at the niche, 2°7in. Depth of 
cranium from posterior surface of molar 
to brow between the orbits, 13°8 in. 
Width of brow between middle of orbits, 
13°6in. Width of naso-maxillary open- 
ing, 94in. Width of muzzle at sub- 
orbital foramen, 10° in. 
2 Another valuable specimen of palate 
of H. planifrons is of same age as that 
in Pl. yi. figs. 4, 5, and 6, but is a little 
further advanced and belonged to a 
larger animal. The first true molar is 
an inch longer and is much broader and 
