DESCEIPTION OF PLATES. 551 



Figs. 5 and 5 a. — Drepanodon Sivalensis. Fragment of npper 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 npper canine, are well seen. — B.M. No. 

 16,573. 



Figs. 7 and 7 a. — D?-epa7todon 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 O. 



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

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

 tinct memoir (see antea, page 321). Its chief jjeculiarities are to be 

 foimd in the teeth, which are constructed more after the type of the 

 higher Carnivora than any other described species of the genus. 



Figs. 1, la, 1 &, 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 considerable 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 towards 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, and is also represented in Plate XXVI. figs. 1 and 2. — 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 lear tiibercular molar 

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

 antepenultimate or carnassier is chiefiy remarkable for its length. The 

 penultimate or first tiibercular 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 

 (See antea, j>. 321).— B.M. No. 39,722. 



The specimen is also represented in Plate XXVI. figs. 3 and 4. 



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

 vertebra or axis. — B.M. No. 37,143. 



