434 Memoirs of the Indian Museum. [Vol. V, 



bands, broad towards the mesial line and tapering to a point towards the angle of the 

 jaw, the two taken together being much longer than the band of teeth in the upper 

 jaw (text-fig. n). 



Probably a casual visitor to the lake. 



Distribution: — Seas of India and China, and East Africa. A variety of this 

 species occurs in Africa. 



Genus MACRONES, Duméril. 

 Macrones cavasius (Hamilton Buchanan). 



1822. Pimelodus cavashis, Hamilton Buchanan, Fish. Gang., pp. 203 and 379, pi. xi, fig. 67. 



1841. Pimelodus seengtee, Sykes, Trans. Zool. Soc, II, p. 374, t. lxvi, fig. 2. 



1865. Hypselobagras cavasius, Day, Fish. Malab., p. 188. 



1878. Macrones cavasius. Day, Fish. Ind., p. 447, pi. c, fig. 1. 



1889. Macrones cavashis, Day, Faun. Brit. Ind., Fish., I, p. 155. 



One specimen from Barkul secured in September, 1914, measuring 85 mm., is in. 

 the collection. It evidently entered the lake from neighbouring fresh waters during 

 the floods and is only a chance visitor when the water is entirely fresh. 



Distribution : —In fresh waters of Sind, Southern India, Bengal, Assam and 

 Burma. 



Macrones gulio (Hamilton Buchanan). 



1822. Pimelodus. gulio, Hamilton Buchanan, Fish. Gang., pp. 201 and 379, pi. xxiii, fig. 66. 



1849. Bagrus abbreviatus, Cantor, Joum. Asiat. Soc. Bengal, XVIII, p. 1236. 



1878. Macrones gulio, Day, Fish. Ind., p. 445, pi. xcix, fig. 2. 



1889. Macrones gulio, Day, Faun. Brit. Ind., Fish., I, p. 151, fig'. 64. 



There are altogether forty-five specimens of this species in the collection, from 

 different parts of the lake ; they are of all sizes as shown in the list given below. 

 In all the specimens no anal papilla proper is found, but in its place, that is at 

 a distance of one diameter of the eye behind the vent, there is a pore edged with 

 a thick fimbriated muscular margin. The ventral fins almost reach the anal fin. 

 The colouration of the pectoral , ventral, anal and caudal fins is very variable, 

 in some they are black all over, in others the superior sides of the paired fins 

 are quite white, in still others only the tips of some of these fins are black and the 

 rest white ; sometimes the tips of the anal or the ends of the caudal fins only are 

 black. 



The fish is a permanent inhabitant of the lake and breeds freely in it. It is 

 more numerous in the outer channel and probably is replaced by Macrones vittatus 

 (Bloch.) in the north-east corner of the main area where freshwater channels enter 

 the lake. 



The following list of the catch will roughly show the distribution of the species in 

 the lake : — 



1 specimen Off mouth of Barkul Bay . . i8-ix-i4, measuring 45 mm. 



1 „ Nalbano Island . . . . 25-XI-14, ,, 58 mm. 



1 ,, Parikudh . . . . 28-ix-i4, ,, 81 mm. 



