182—28 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
from India ; there is some amount of uncertainty as to the real number of existing 
species, but they may be provisionally ranged under five heads, viz .-. — 
A. Third vey-tehral plate tapering posteriorly. 
P. TECTUM (Bell). Carapace elevated : in the type form (pi. XXII. figs. 4. 6. 7.) 1st 
vertebral pentagonal, narrowest posteriorly, and longer than broad : ‘2nd hexagonal or 
pentagonal, narrowed posteriorly, usually more or less rounded, and longer than broad. 
In var. intermedimn, Blanfordi> (pl- XXII. fig. 8) the 1st and 2nd vertebrals are shorter; 
the latter being hexagonal, and not rounded posteriorly. 
P. TENTORiA (Gray). Carapace less elevated: 1st vertebral subquadrangular (pi. XXII. 
fig. 9.), as broad posteriorly as anteriorly ; 2nd rounded posteriorly, narrowed, and 
relatively long. 
P. FLAViVENTRis, Giinther. Carapace more elevated than in P. : 1st vertebral bell- 
shaped (pi. XXII. figs. 10. 11.), broadest posteriorly: 2nd rounded posteriorly, 
narrowed, and relatively long. 
P. SYLHETENSIS, Jerdon. Carapace elevated, 1st vertebral pentagonal, longer than broad 
in adult, with a tendency to a bell-shape, broadest anteriorly in young, and shorter : 2nd 
vertebral short and much broader than long : 3rd strongly keeled, much longer than 
2nd, and slightly narrowed behind : 5th very narrow : posterior edge of carapace 
deeply serrated. 
B. Third vertebral plate truncated posteriorly . 
P. SMITHI (Gray), (pi. XXII. fig. 5). Carapace depressed: 1st vertebral bell-shaped, 
broadest posteriorly : 2nd subquadrangular, much broader than long, and shorter than 
the 1st. 
The first four species, forming what may be called the tectiform group, are 
closely allied ; and as the variety intermedium diminishes the distinction between P. 
tectum and P. tentoria, it has been suggested that the latter is merely a depressed race 
of the former.^ P. syllietensis (which Mr. Theobald® is inclined to class with P. 
tectum) is apparently a connecting link between the other members of the tectiform 
group and P. smithi : the specimens in the British Museum seem to leave little doubt 
of its claim to specific distinctness ; the form of the 2nd, 3rd, and 5th vertebrals, 
and the deeply serrated posterior margin of the carapace being very characteristic 
features. Two other species are admitted in Gray’s “ Supplement to the Catalogue 
of Shield-Reptiles” (pt. I. pp. 60-61), viz.., P. leithi and P. ventricosa-, the latter is 
probably only a varity of P. tectum'^ ; and the former is founded only on a skull 
which Mr. Theobald thinks may belong to a distinct genus. 
7 
Species 1. Pangshura flaviventris, Giinther.® 
Syn. Emys namadica, Theobald.® 
Cuchoa flaviventris, Gray.’’ 
Narbada specimen. — The shell figured of half the natural size in pi. XXII. fig. 2 
(the first three vertebral plates being drawn of the. full size in, fig. 10) was obtained 
1 ‘ Journ. As. Soc. Beng.’ vol. XXXIX. pt. II. p. 339 (1870). 
2 Vide Theobald, “ Catalogue of Reptiles of British India,” pp. 14-17. 
3 Ibid,Y5 15 16 17. Jerdon was correct in describing the th vertebral as being wffcrnw. 4 Ibid.'p. 13. 
5 “ Reptiles of British India,” p. 35 (1864). F. Jiaviventtr. 6 ‘ Mem. Geol. Surv. Ind.’ vol. II. p. 395 (i860). 
7 ‘‘Supplement to Catalogue of Shield -Reptiles,” pt. I. p. 61 (1870). 
