DESCRIPTION OF PLATES. 107 



Fig. 7. — Equus Namaclicus, from the Nerbudda. Fragment of upper 

 jaw, right side, with entire molar series. — B.M. 



Length of molar series, 7"0o in. Length of three true molars, 3 - 2 in. Length 

 of third molar, 1"15 in. Breadth of ditto, -9 in. Length of second molar, 1-05 in. 

 Breadth of ditto, Tl in. Length of first molar, - 96 in. Breadth of ditto, 1-05 in. 

 Length of third premolar, Tloin. Breadth of ditto, 1*15 in. Length of second 

 premolar, l - 16in. Breadth of ditto, 1*1 in. Length of first premolar, 1*55 in. 

 Breadth of ditto, TO in. 



Fig. 8. — Equus Namadicus. Fragment of lower jaw, left side, with 

 entire molar series. — B.M. 



Length of molar series, 7'93 in. Length of three true molars, 3 - 76 in. Length 

 of third molar, 1-2 in. Breadth of ditto, - 5 in. Length of second molar, 1*2 in. 

 Breadth of ditto, "65 in. Length of first molar, 1*25 in. Breadth of ditto, - 7 in. 

 Length of third premolar, l - 2in. Breadth of ditto, "7 in. Length of second pre- 

 molar, 1-3 in. Breadth of ditto, "73 in. Length of first premolar, l - 55 in. Breadth 

 of ditto, -66 in. 



Figs. 9, 9 a, and 9 b. — Equus Palceonus (Falc. and Cant.), from 

 the Nerbudda. Fragment of anterior portion of palate, with six in- 

 cisors and two small canines. Presented by C. Frazer, Esq. — B.M. 



Between inner alveolar margins of canines, 1*1 in. Diastema between canine 

 and external incisor, - 8 in. Between posterior angles of external incisors, l - 7in. 

 Length of three incisors of one side, 1*6 in. Length of external incisor, - 6 in. Length 

 of middle ditto, -65 in. Length of internal ditto, '56 in. Length of alveolus of 

 canine on left side, "4 in. Breath of ditto, "3 in. 



Figs. 10, 10 a, and 10 b. — Equus Palceonus. Fragment of anterior 

 portion of lower jaw, with six incisors. — B.M. 



Breadth across posterior margin of external incisive alveolus of left side, 

 2 - 4in. Length of three incisors of one side, l - 45in. Length of broken end of 

 external incisor, - 45 in. Length of crown of middle incisor, "5 in. Length of 

 crown of internal ditto, -4 in. 



Figs. 11 and 11 a. — Equus Palceonus. Fragment of lower jaw, right 

 side, milk dentition. — B.M. 



Length of third milk molar, grinding surface, l - 3 in. Breadth of ditto, - 36 in. 

 Length of second milk molar, grinding surface, l - 15in. Breadth of ditto, "4 in. 

 Length of first milk molar, grinding surface, 1*2 in. Breadth of ditto, -4 in. 



Figs. 12, 12 a, and 12 b. — Fossil Equus, from the Irrawaddi. Frag- 

 ment of lower jaw, comprising symphysis and six incisors. — B.M. 



Length of fragment, 4-4 in. Between external angles of external incisors, 2'4 in. 

 Length of three incisive alveoli of one side, 1*5 in. 



Fi.L'-. 13. — Hippotherium Antilopinum (Falc. and Caut.), from the 

 Sewalik hills. Fragment of upper jaw, left side, with entire series of 

 six molars. — B.M. 



Length of molar series, 5*3 in. Length of three true molars, 2 - 36 in. Length 

 of third molar, "8 in. Breadth of ditto, -55 in. Length of second molar, -85 in. 

 Breadth of ditto, - 76 in. Length of first molar, - 8 in. Breadth of ditto, - 85 in. 

 Length of third premolar, "93 in. Breadth of ditto, - 86 in. Length of second pre- 

 molar, - 96 in. Breadth of ditto, - 95 in. Length of first premolar, T25 in. 

 Breadth of ditto, "83 in. Height of second premolar, 2 - 15 in. Height of first pre- 

 molar to origin of fangs, 1"4 in. 



Fig. 14. — Hippotherium Antilopinum. Fragment of lower jaw, right 

 side, with three premolars and portion of first true molar. — B.M. 



Length of three premolars, 3'1 in. Length of three premolars and first molar (frag- 

 ment;, 41 in. Remaining portion of diastema, 1*8 in. Length of first molar 

 (fragment), - 8in. Breadth of ditto, '55 in. Length of third premolar, - 96 in. 

 Breadth of ditto, - 6 in. Length of second premolar, -96 in. Breadth of ditto, 

 •oo in. Length of first premolar. l'Oo in. Breadth of ditto, "5 in. 



