166 Records of the Indian Museum. [| Vou. VII, 
Both these specimens present fully adult individuals and have 
already been referred to in published works. No. 1094 is the one 
mentioned by Theobald on p. 15 of his ‘‘ Catalogue of Reptiles in 
the Museum of the Asiatic Society of Bengal” as T. guntherit, 
Gray ; while the other (No. 755) is all that remains of the speci- 
men described in detail by Anderson in 1871. 
I was at first inclined to think that neither could belong to 
the species described by Theobald as T. phayrei, because of the 
broadness of the skulls (fig. 4) and of the fact that the callosities 
Fic. 4.—Adult skull of Tvionyx phayret from below (reduced). 
of the plastron are distinctly though not deeply sculptured. It 1s, 
however, probable that these discrepancies are due entirely to the 
fact that most of the specimens hitherto examined have not been 
fully adult, for parallel if not quite as great differences may be 
noticed between the skulls of half-grown and of full-grown indivi- 
duals of 7. gangeticus as those that evidently exist between the 
skull figured by Gray under the name 7. jeudi (and by Boulenger 
in his British Museum Catalogue (p. 252, fiz (6) under that of 
Tl. phayrei) and those now before me. It is evident, moreover, 
