DESCKIPTION OF PLATES, 431 



enamel plates projecting. Proved to be E. planifrons by the distance 

 between tlie plates, the very low crown, thick enamel, and two mental 

 foramina. — B.M. 



Extreme length of jaw, 24-2 in. Height of alveolar margin, 7'5 in. Height of 

 ascending ramus to top of the condyle, 20'2 in. Width of ascending ramus from 

 coronoid margin to posterior edge, 10'5 in. Greatest thickness, 6'1 in. Transverse 

 measurement of condyle, 4-2 in. Length of molar, lO' in. Width of molar at 

 middle, 3'6in. 



Fig. 4. — E. planifrons. Is a most remarkable fragment of the last 

 molar, upper jaw, right side, taken out of a palate in H. P.'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, 2'5 in. 



Fig. 5. — Eleplias planifrons. Enormous tooth-fi-agment, 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 fi:ont ridges barely touched. The 

 ridges have few points, the .fourth having only five. ( Vide E. insiqnis, 

 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. Lefl; side of lower jaw, with last molar very 

 old. AU the first half of the grinding ridges worn out. Very great 

 expansion of the plates. Three mental foramina outside. — B.M. 

 Length of molar, 102 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, 8-6 in. Greatest thicloiess, 

 6-4 in. Length of molar, 12'1 in. Width at fourth ridge, 3-6 in. Greatest 

 width, 3-8 in. 



Fig. 9. — Elephas planifrons. A fi-agment 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, 

 and enamel very thick ; ridges very low ; resembles Plate XVIII A 

 fig. 1.— B.M. 



Fig. 10. — E. planifrons. Lower (upper in MS.) jaw, left side, with 

 penultimate and last molar. The whole of the penultimate much worn ; 

 the two front ridges worn out ; has eight ridges and a very small heel. 

 The tooth is very broad for its length; has a great abundance of 

 cement ; the enamel is very thick ; figured for the remarkable fact of 



