DESCRIPTION OF PLATES. 131 



Figs. 5 and 5 a. — Drepanodon Sivalensis. Fragment of upper jaw, 

 containing two anterior molars. The first is simple, singled-fanged 

 and very small. The second is the carnassial or sectorial tooth. Its 

 crown is more compressed, its trenchant margins sharp. See descrip- 

 tion of fig. 4.— B.M. No. 39,730. 



Figs. 6 and 6 a. — Drepanodon Sivalensis. Lower jaw, right side, 

 more perfect than fig. 4, and containing the incisors as well as the 

 canine and three molars. The downward projection of the symphysis, 

 and the depression for the upper canine, are well seen. — B.M. No. 

 16,573. 



Figs. 7 and 7 a. — Drepanodon Sivalensis. Another specimen of 

 lower jaw, right side, containing three molars and alveolus of large 

 canine. — B.M. No. 16,537. 



Figs. 8 and 8 a. — Drepanodon Sivalensis. Fragment of lower jaw, 

 with three molars. — B.M. No. 16,554. 



Plate 0. 



Ursvs (Hycenarctos) Sivalensis (Falc. and Caut.), from the Sewalik 

 hills. The fossil Bear of the Sewalik hills forms the subject of a dis- 

 tinct memoir (' Asiatic Researches,' vol. xix.). Its chief peculiarities 

 are to be found in the teeth, which are constructed more after the 

 type of the higher Carnivora than any other described species of the 

 genus. 



Figs. 1, 1 a, 1 b, and 1 c. — Superb specimen of cranium. The three 

 rear molars are perfect on one side, and but little damaged on the other. 

 Both canines are present, and that of the right side is entire. The 

 alveoli of the two false molars and three incisors on either side are dis- 

 tinct, although the teeth are wanting. The only considei-able deficien- 

 cies are in the posterior and lower parts of the occiput, both zygomatic 

 arches, and in the lower end of the nasals, where a fissure extends 

 across the face, on both sides tow r ards the orbits. Fig. 1 a shows the 

 dental series on right side, of natural size. 



This specimen is described in detail in the memoir already referred 

 to, in the 'Asiatic Researches,' vol. xix. — B.M. No. 39,721. 



Figs. 2 and 2 a. — Ursus Sivalensis. Greater part of the body of the 

 lower jaw, broken off where the canine protrudes, and also deficient in 

 the coronoid and articulating processes. There are indications of six 

 molars, of which the two first premolars and the rear tubercular molar 

 have dropped out. The third premolar is distinctly three-lobed. The 

 antepenultimate or carnassier is chiefly remarkable for its length. The 

 penultimate or first tubercular is broader for its length and less com- 

 plicated with tubercles than what is general in the genus. Fig. 2 a 

 shows the dental series of the natural size. 



Further details of this specimen are given in the memoir on Ursus 

 above referred to. — B.M. No. 39,722. 



Figs. 3, 3 a, 3 b, 3 c, and 3 d. — Ursvs Sivalensis. Second cervical 

 r.ra or axis. — B.M. No. 37,143, 



