188—34 INDIAN TERTIAEY AND POST-TERTIARY VERTEBRATA. 
genus, and the condition of the sutures between the bony scutes indicates its adult 
condition. The nuchal plate forms a narrow triangle : the 1st vertebral plate is belh 
shaped, much narrower in front than behind, its length equaling the width of the 
posterior border. Tlie 2nd vertebral is longer than the 1st, and rather shorter tlian 
the 3rd: both the 2nd and 3rd are rather longer than broad: the 4th is hexagonal, 
much shorter than the 3rd, which it nearly equals in breadth, and is about as long as 
broad. The anterior and posterior borders of the 3rd vertebral plate traverse two 
vertebral scutes separated by an intervening third scute situated in the centre of the 
plate. The hinder vertebral scutes are distinctly keeled. The plastron is rounded, 
without lateral keels ; the abdominal plates are nearly twice the length of the 
pectorals ; the suture between the postgulars and pectorals forms a nearly straight 
line ; and the width between the axillary is less than that between the inguinal 
incisions. The shell is vaulted, and is highest near the hinder border of the 2nd 
vertebral plate; the ascent from the anterior margin of the carapace to this point 
being very rapid [plate XXIV. fig. 4). The bony scutes of the shell are marked by 
very bold areolse. 
Young specimen . — In the Dublin Museum there is the shell of an emydine^ from 
the Siwalik Hills (being one of the specimens collected by Generals Sir W. E. 
Baker and Sir H. M. Durand^), evidently pertaining to a young individual, which 
not improbably belongs to the present species. It has the same general contour as 
the type specimen ; and the vertebral plates agree in relative proportion, the 3rd 
vertebral plate having a scute in its centre lying between the two scutes marked by 
the sutures of the plate. The 1st vertebral plate is somewhat less narrowed anteriorly 
than in the adult ; and there is an interrupted vertebral keel : the nuchal plate and 
the plates of the plastron are not shown. The length of this specimen when 
complete was about 12 inches. 
Second young specimen . — In plate XXV. fig. 1 . there is represented of one-half 
the natural size the greater part of the carapace of a young emydine tortoise 
collected by Mr. Theobald in the Siwaliks of Asnot, Punjab, which has such a strong 
general resemblance to the adult shell described above that it not improbably belongs 
to the same species. Tlie sutures between the bony scutes are disunited, which is an 
indication of the immature condition of the specimen : the vertebral scutes are of 
the elongated form characteristic of the majority of the emydines. As in the adult 
shell, the 4th and 5th vertebral scutes bear a distinct prominence, and the relation of 
the 5th scute to the overlying 3rd plate is the same in both : the immature specimen 
also exhibits the strongly marked areolae so characteristic of the adult. The nuchal 
plate is unfortunately not shoAvn in the present sjoecimen ; but the form of the 1st, 
2nd, and 3rd vertebral plates agrees precisely with that presented in the adult. The 
immature carapace is more depressed than in the adult, but this difference may be 
due merely to the different ages of the two specimens. 
Distinctness and afiinities . — Confining comparisons to the adult specimen, the 
1 Vidt ‘ Journ, R. Dublin Soc.’ ser. 2. vol. 111. p. 85.’. (1884). No. C. S. ^ Ibid, p. 70. 
