DESCRIPTION OF PLATES. ll 
19°in. Height to anterior margin of alveolus, 8°in. Greatest thickness behind, 
6'5in. Interval between teeth in front, 3:6in. Interval behind, 5°6in. Length 
of right molar, 11°8in. Width of right molar in front, 3*in. Width behind, 2°8 in. 
Fig. 3.—E. planifrons. Superb specimen of left half lower jaw, 
entire. The coronoid crescent slopes downwards from the condyle. 
Crown of the tooth very low. Seven last plates of tooth only remain ; 
great thickness of enamel and abundant cement, and mesial expansion ; 
enamel plates projecting. Proved to be H. planifrons by the distance 
between the plates, the very low crown, thick enamel, and two mental 
foramina.—B.M. 
Extreme length of jaw, 24:2in. Height of alveolar margin, 7'5in. Height of 
ascending ramus to top of the condyle, 20°2in. Width of ascending ramus from 
coronoid margin to posterior edge, 10‘5in. Greatest thickness, 6*lin. Transverse 
measurement of condyle, 4:°2in. Length of molar, 10°in. Width of molar at 
middle, 3°6 in. 
Fig. 4.—£. planifrons. Is a most remarkable fragment of the last 
molar, upper jaw, right side, taken out of a palate in H. F.’s collection. 
_ It is figured to show how diversified the species may be, and also the 
dedalian line of flexure. 
Length of fragment, 5:4 in. Width, 2°65 in. 
Fig. 5.—Elephas planifrons. Enormous tooth-fragment, with very 
thick enamel, low plates, and mesial expansion. This specimen is 
twice figured (See Plate XVIII. A. fig. 2). It is the last molar, lower 
jaw, right side.—B.M. 
Length, 10°5 in. Greatest width, 4:2 in. Height of ninth plate, 3°5 in. 
Number of ridges, 9. 
Fig. 6.—Elephas planifrons. Lower jaw, left side, with first and 
second (antepenultimate and penultimate) true molars. The first 
tooth is much worn; shows about six plates; enamel transverse with 
little crimping. The penultimate has nine ridges and a small heel, or 
eight and a double heel; the two front ridges barely touched. The 
ridges have few points, the fourth having only five. (Vide E. insignis, 
Plate XVIII. fig. 7).—B.M. 
Length of front molar, 6° in. Greatest width, 2°8 in. Length of penultimate, 
8: in. Width at fourth ridge, 2°8 in. 
Fig. 7.—E£. planifrons. Left side of lower jaw, with last molar very 
old. All the first half of the grinding ridges worn out. Very great 
expansion of the plates. Three mental foramina outside.—B.M. 
Length of molar, 10°2 in. Greatest width, 4° in. 
Fig. 8.—E. planifrons. A magnificent typical specimen, consisting 
of a fragment of the lower jaw with whole length of penultimate true 
molar; the anterior fang exposed; the three first ridges on this fang 
gone by wear; eight other ridges, making eleven ridges and a heel; 
enamel very thick; plates wide apart; much cement; few points ; 
three mental foramina.—B.M. 
Height of jaw to alveolar margin, outer side, 86 in. Greatest thickness, 
64 in. Length of molar, 1271 in. Width at fourth ridge, 36 in. Greatest 
width, 3°8 in. 
Fig. 9.—Elephas planifrons. A fragment of last lower molar, left 
side, intended to show the large digitations and few points of the 
species. It has the three last ridges and a heel; points very distinct, 
