( 15 ) 



P. flaviventer, Gunther. 



Guchoa flaviveutris, Gray. Sup., Cat. S. R., p. 61. 



Resembles tectum, but the first vertebral is " beU-shaped." It 

 is rather more elevated, having a large impression in the mid- 

 dle of the second and third costal plates. Nuchal plate broader 

 behind. Colour: above uniform horny, the ridge lighter, the 

 nodose prominences, darker. Lower parts uniform, yellowish, 

 with a brown blotch on the lower side of each marginal plate. 

 Grows to 11 inches, (vide Cockburn.) 



Inhabits the Ganges near Allahabad. 



P. Smithii, Gunther. Monog., p. 36, fig. on p. 2. 

 Batagur Smithii, Gray. Sup. 

 Em,ia Smithii, Gray. Sup., Cat. S. R., p. 61. 

 Nuchal triangular. Shell ovate, depressed with a vertebral 

 ridge rising into a nodosity on the back part of the third verte- 

 bral. The first vertebral is bell-shaped, the second sub-quadran- 

 gular, the third rectangular oblong, two-thirds as broad as long. 

 Colour, above pale yellowish olive, with a black vertebral line; 

 beneath black, with yellow margins to the plates, and with a 

 yeUow central keel dividing the two colours on the marginal 

 plates. Grows to 8 inches. 



Inhabits the Jumna, Ganges, and Punjab Rivers — Sutlej, 

 Chenab, Indus, &c. 



P. Sylhetensis, Jerdon. Proc, As. Soc, Beng., March 1870. 



Jerdonella Sylhetensis Jerdon, Gray. Sup., Cat. S. R., p. 61. 

 Closely allied to tectum, from which Jerdon distinguished 

 it, not without hesitation. The last vertebral is broader,* 

 behind those is tectum,, its lateral suture coinciding with the 

 anterior suture of the antepenultimate marginal. Gray thus sums 

 up the difierences which separate this animal generically and 

 specifically from tectum and its allies. "This species differs 

 from P. flaviveutris in the keel of the first three shields being 

 pale — and not black, and much more indistinctly marked than in 



* (Jerdon (I c) says narrower, but this is a clerical error, if we are to follow 

 Gray's description. App , Cat. S. E,, p. 18 — .) 



