174 W. Theobald — On Indian and Burmese Species of Trionyx. [August, 



' Testudo chitra 1 and applies the term ' cKhvm? to a Trionyx. Now it seems 

 to me very probable that this is a clerical error, and the names have been 

 transposed, as chitra, which I presume is an etymological cousin of ' chittee' 

 1 chitul,' ' chitur] meaning spotted (a spotted snake, the spotted axis, the 

 leopard), is very applicable to the adult figure of ' chhim\ as is at once seen 

 by reference to the original drawing. In this drawing the back is represented 

 as a dark plumbeous olive, very rich and uniform, and profusely studded with 

 small equidistant and equal lenticular spots of a paler colour with their long 

 axes arranged longitudinally. The head is uniform, with two large ragged 

 temporal blotches of a pale colour, but- no pale band in front of the eyes. 

 Be this as it may, ' cJiItim' is the recognised vernacular name of the chitra 

 and is therefore inapplicable and must be set aside in favour of Buchanan 

 Hamilton's other name ' seivaare.'' 



Sab. — The Ganges valley. 



From the separation now effected of this Trionyx, uniting the coloura- 

 tion of ' ocellatus 1 and the facial profile of Gangeticus, it follows that the true 

 ocellatus with a conspicuous yellow band across the snout, is still available 

 as a name for the species designated hurum by Anderson and Buclianani by 

 myself. 



T. ocellatus, Buch. Ham. (young) Anderson and Gray. PI. IV. 



T. BucJumcmi, Theoh., P. A. S. B. 1874, p. 78. 



T. hurum, Anderson, A. & M. N. H. 1872, Vol. IX, p. 382. 

 T. seivaare, Buch. Ham. apud Anderson, 1. c. 

 Kala Jcachim of the Bengali fishermen. 



In his paper in the Annals 1. c, Dr. Anderson does not discriminate, or 

 even allude to the last described ' sewaare,' though specimens in the museum 

 were examined by him. They were not in the best state, but whether from 

 this or from not discriminating them, he appears to refer them all to one 

 species, hit/rum apud Anderson. From ' seivaare' the present species is dis- 

 tinguished externally by a pale yellow band across the nose, in front of the 

 eyes, which is absent in seivaare, and by a much greater development of the 

 pale yellow blotch beneath the lower jaw on either side, which is slightly 

 developed in ' seivaare,'' but forms a prominent band rising with a slight 

 curve upwards towards the back of the neck in ocellatus. From seivaare it 

 is also distinguished by the more elongate form of the anterior half of the 

 skull, the profile of the face of seivaare being the same as in Gangeticus, and 

 differing wholly from ocellatus, though the subspatulate S3inphysis of the 

 mandible departs from the form of Gangeticus and resembles that of ocella- 

 tus. 



For a comparison of the dermal characters there are no materials. 



Dr. Anderson was clearly led to the identification of ocellatus and hurum 

 by the fact that the figure of hurum displays four ocelli, which Dr. Anderson 



