56 Mr. C. R. Narayan Rao on 



In jerdonia hrevhnentalia, the eyes are rnore than four 

 times in the length of the head, 2 diameters from end of 

 snout, and 2^ diaraeteris apart. 



(2) Mental disk. — In jerdonia, broadly subcircular, the 

 lower labial fold is jur,t half the width of the central pad ; 

 chest covered with largish scales *. 



In jerdonia hrevimentalis, the metal disk is subtriangular, 

 the lower labial fold nearly equals the width of the pad. 

 Chest nearly free from scales [vide PI. I. fig. 1 a). 



(3) Fins. — J.i\ jerdonia, t\\& pectoral fin is shorter than the 

 doi'sal, and the ventral shorter than the anal. In jerdonia 

 brevimentalia these sets are nearly equal, and the caudal fin 

 is proportionately longer. 



(4) The other points refer to the number of fin-rays and 

 scales, which are summarised iu the description of jerdonia 

 brevimentalis . 



5. Ga7-ra platycephala, sp. n. 

 (PI. I. figs. 2,2a, 2b.) 



D. 10-11 (1/9-10. P. 14-15. V. 10. A. 7-8 (1/6-7). 

 C. 19-20. L. 1. 37-39. L. tr. 4^/4^ 



The head, which is greatly flattened, slopes somewhat 

 abruptly towards the snout, and its length is about five 

 times in the total length without the caudal fin. The depth 

 of the head nearly equals its width behind the eyes. The 

 snout is produced and may be rounded or acute. The 

 diameter of the eye is contained four times in. the length of 

 the head, and is only half the interorbital space. It is also 

 less than half the length of snout. End of snout more or 

 less pinched off by a deep groove, which may extend on both 

 sides of the cheek, and both surfaces covered by fairly open 

 mucous pores. Anterior barbels nearly twice as long as the 

 postej'ior ones, which are hardly visible beyond the hinder labial 

 fold. The outer rays of the pectoral and pelvic fins, which 

 are nearly equal in length, are simple and greatly flattened. 

 The pectoral fin nearly as long as the head or the caudal 

 peduncle. The depth of the caudal peduncle is consideral)ly 

 less than half the height of the longest dorsal fin-ray. The 

 chest is somewhat free from scales or only covered by feebly 

 developed ones. The caudal fin is deeply lobed, the upper 

 lobe being longer. 



The colour above is light olivaceous, slightly brownish on 

 the head. U[»per part of snout pale blue or grey. Sides 

 of body yellow with a dark green lateral band. Ventral 



* 1919. Annandale, Ivec. lud. Mas. pi. xxvii. fig. 3, 



