94 FAUNA ANTIQUA SIVALENSIS. 



Fig. 4, 4 a, 4 b, and 4 c. — Rhinoceros platyrhinus. Fragment show- 

 ing anterior portion of lower jaw, with symphysis and four anterior 

 molars, and a portion of fifth ; also a small inner and large outer 

 incisor on both sides. — B.M. 



Length of fragment, 13-5 in. Breadth of symphysis, 5 - 7 in. Length of sym- 

 physis inferiorly, 7" in. Depth of jaw, 47 in. Thickness of jaw, 3 - 3in. Length of 

 four anterior molars, 7'4 in. Between anterior premolar and external incisive al- 

 veolus, 3"1 in. Between incisive alveoli, - 6 in. Width between molars posteriorly, 

 4" in. ; ditto anteriorly, 3'4 in. 



Figs. 5, 5 a, and 5 b. — Rhinoceros platyrhinus. Small fragment of 

 lower jaw, with two molars. — B.M. 



Length of fragment, 67 in. ; greatest depth, 57 in. ; Thickness, 3 - 2 ; length of 

 molar, 3 - lin.; breadth, 17 in. 



Figs. 6 and 6 a. — Rhinoceros platyrhinus. Fragment of molar. — B.M. 

 Length, 2-3 in. Width, 3-4 in. 



Figs. 7 and 7 a. — Rhinoceros platyrhinus. Molar. 



Length, 3 - 2in. ; breadth, 2 - 8 in. ; height of crown, 3 - l in. 



Plate LXXIII. 



Figs. 1, la, 1 b, and lc. — Rhinoceros Palceinclicus. (Falc. and Caut.) 

 Mutilated specimen of cranium. The zygomatic arches and the anterior 

 portion of the palate are broken off. On the right side the three true 

 molars and three posterior premolars are present ; on the left there are 

 three molars and one premolar. All the teeth are much worn. The 

 upper surface of the skull is very concave. — B.M. 



Length of fragment, 21-8 in. Height of occiput (imperfect) from basilar process, 

 8-1 in. From occipital surface to posterior border of palate (imperfect), 12-5 in. 

 Between mastoid angles, greatest diameter of occiput, 9 - in. Transverse diameter 

 of occipital foramen, 1*9 in. Vertical ditto, 1*3 in. Breadth of cranium at anterior 

 orbital angles, 87 in. Between anterior angles of orbital margin, 3 - 9in. Between 

 sub-orbital foramina (posterior border), 4-8 in. Chord of nasal notch, 4-5 in. Length 

 of three true molars, 6 - l in. Length of three posterior premolars, 5 - in. Width of 

 palate between posterior molars, 2-2 in. Ditto between second premolars, 2 - 5 in. 

 Greatest width of alveolus, 2 - 8 in. Length of palatine notch, 5"5 in. Width of 

 ditto, 2- in. 



Figs. 2, 2 a, 2 b, and 2 c. — Rhinoceros Sivalensis (Falc. and Caut.), 

 from the Sewalik hills. Tolerably perfect specimen of cranium. The 

 upper part of the occiput and the left zygoma are absent. The left 

 maxilla shows three molars and three premolars, and also the alveolus 

 of the first premolar. The teeth are well worn ; the palate is narrow. 

 The upper surface of the cranium is concave, and the tip of the nasal 

 shows the gibbosity of the base of a very large horn. The species was 

 evidently unicorned. — B.M. 



Extreme length of fragment, 22 - o in. From posterior plate of occipital condyles 

 to anterior margin of first premolar, 20 - 4 in. From lower border of occipital fora- 

 men to posterior border of palate, ll - 9in. Length of molar series, 11*1 in. Length 

 of three true molars, 5 - 8 in. Width of palate between posterior molars, 2 - 5 in. 

 Width of palate at anterior angle of first premolars, 2-2 in. Greatest width of al- 

 veoli, 2-6 in. Length of palatine notch, 5 - 3 in. Width of ditto, l - 9 in. Between 

 inner angles of articular surfaces for lower jaw, 3'2 in. Between most distant 

 points of zygomatic processes, 137 in. Depth of zygomatic fossa, 3 - l in. Height of 

 occiput (imperfect) from lower border of occipital foramen, 9 - in. Between outer 

 angles of occipital condyles, 4 - 8 in. Between mastoid angles, or greatest transverse 

 diameter of occiput, 8 - 6 in. Breadth of occipital foramen, 17 in. Height of ditto, 



