DESCEIPTION OF PLATES. 525 



Figs. 2, 2 a, and 2 b. — Equus Sivalensis. Fragment comprising 

 posterior portion of skull, broken off in front in a line witli anterior 

 angles of zygomatic arches. Shows occipital foramen, crest, condyles, 

 and posterior roots of zygomata. — B.M. 



Length of fragment, 7'6 in. Height of occipital facet from lower border of 

 occipital foramen to summit of occipital crest, 4-8 in. Between inferior angles of 

 occipital crest, ■4-7 in. Breadth of craniuna between roots of zygomata, 37 in. 

 Length of ridge of occipital condyle, 1'7 in. Height of condyle (greatest), 2'1 in. 

 Between inner margins of condyles, 1-5 in. Height of occipital foramen, 1-6 in. 



Fig. 3. — Equus Sivalensis. Fragment of upper jaw, with whole 

 series of six molars. — B.M. 



Length of fragment, 9-3 in. Height of fragment (length of molar), 4-1 in. 

 Length of molar series, 7"7 in. Length of three true molars, 3-4 in. Breadth of 

 alveoli, TB in. 



Fig. 4. — Equus Sivalensis. Fragment of horizontal ramus of lower 

 jaw with whole series of six molars. — B.M. 



Length of fragment, 11- in. Depth of jaw at anterior border of fourth premo- 

 lar, 3-6 in. Width of ditto, 1-2 in. Length of molar scries, 7-8 in. Length of 

 three true molars, 3'7 in. 



Figs. 5, 5 a, 5 b, and 5 c. — Equus Namadicus (Falc. and Caut.), 

 from the Nerbiidda Valley. The occipital condyles and foramen and 

 the left zygomatic arch are very perfect ; also the whole series of six 

 molars on left side. The specimen is broken oiF in front of first 

 (permanent) premolar on left side ; from this the hne of fracture passes 

 obliquely aci-oss the palate and through the middle of the hindmost 

 right premolar. The three right tru.e molars are present. The right 

 zygomatic arch is absent. — B.M. (See antea, p. 186.) 



Extreme length of fragment, 17'6 in. From lower border of occipital foramen 

 to posterior border of palate, 9-6 in. Greatest breadth of cranium at roots of zy- 

 gomatic processes, 4-4 in. Between extreme points of zygomata, 7-9 in. Between 

 anterior angles of orbits, 6' in. Height of cranium from palate at fractured 

 extremity, 3-6 in. Great diameter of orbit, 2-8 in. Lesser diameter of orbit, 

 1-8 in. Height of occipital facet from lower border of occipital foramen, 4-2 in. 

 Between inferior angles of occipital facet, 4-1 in. Depth of zygomatic fossa, 1-7 in. 

 Width of palatine notch, 17 in. Width of palate posteriorly, 3- in. Width of 

 palate anteriorly, 27 in. Width of alveoli, M in. Length of molar series, 7- in. 

 Length of true molars, 3'3 in. 



Fig. 6. — Equus Namadicus. Fragment of left upper jaw comprising 

 whole molar series. — B.M. 



Length of fragment, 9-2 in. Length of molar series, 7" in. Length of three 

 true molars, 3-2 iu. Breadth of alveoli, 1-2 in. 



Fig. 7. — Equus Namadicus. Fragment of left lower jaw with entire 

 molar series. The fracture exposes the fang of the last true molar. — 

 B.M. 



Length of fragment, 127 in. Depth of jaw at anterior border of fourth pre- 

 molar, 3-8 in. Width, 1-2 in. Length of molar series, 8- in. Length of three 

 true molars, 38 in. 



Plate LXXXII. 



Fig. 1. — Equus Sivalensis. Upper jaw, right side, with entire molar 

 series. — B.M. 



Length of third molar, 1-16 in. Breadth of ditto, 1-03 in. Length of second 

 molar, 1-16 in. Breadth of ditto, 1-2 in. Length of first molar, M6 in. Breadth 



