igig-] B- I^- Chaudhuri : Fish from Burma. 277 



measurements of both specimens are given below for reference. 

 The mouth is inferior. The lip is lobate and reflected and spreads 

 continuously round the mouth so as to form a broad flat sucker. The 

 teeth in the jaws are villiform in broad bands. The bases of the 

 maxiflary barbels are dilated ; the mandibular barbels are short, 

 round and thick, the surface of these barbels being studded with 

 closely set tubules. The posterior nostril is slit-like, while the 

 anterior one is round and terminates in a funnel-like structure. 

 There are four or five bony tubercles in a horizontal line on each 

 side near the gill-opening below the dorsal spine. The chest is 

 coriaceous with slight corrugations. The body is dark brown in 

 colour, with two white broad transverse stripes made up of white 

 blotches. The anterior band is at the end of the dorsal fin, and 

 the posterior one nearer to the root of the caudal. The pectoral 

 and the pelvic fins are grey marked with black blotches; the 

 caudal fin is greyish-brown. The maxillary barbels are annulated 

 in white and brown while the mandibular barbels are white. 



Measurements of specimens : — 



Total length (without caudal fin) in millimeters 



Length of head including opercular flap ,, 



Depth of body m 



I^epth of caudal peduncle „ " 



Length of snout ,, 



Depth of head at occiput n 



Width of head ,. 



Width of interorbital space ., 

 From tip of snout to anterior limii of dorsal fin ,, 



Height of dorsal spine ,, 



,, of longest dorsal ray ;, 



Length of pectoral fin ., 



,, of pelvic fin ,, 



Base of anal fin ,, 



Height of anal fin ,, 



From tip of snout to root of pectoral fin ,, 



From tip of snout to root of pelvic fin ,, 

 From tip of snout to anterior end of anal fin ,, 



From tip of snout to anal opening ,, 

 Number of rays in the dorsal fin 



,, ,, ,, pectoral fin 



,, ,, ,, pelvic fin 



M ,, ,, anal fin 



Distribution. — Upper Burma (N. Frontier) ; China (Chusan). 



Genus Exostoma, Blyth. 

 Exostoma vinciguerrae, Regan. 



1890. Exostoma labiatiim {)ion M'Clelland), V'inciguerra, An??. Miis. civ. 



Star. Nat. Geneva (ser. 2), IX, p. 252. 

 1905. Exostoma vinciguerrae, Regan, Ann. Mag. Nat. Hist. (ser. 7), X\', 



p. 184. 



There are two specimens in the collection, one measuring 

 56 mm., from the Putao Plains and another measuring 45 mm. from 

 the Nam-Yak river at Tanja. The smaller specimen is damaged 

 and distorted. From the measurements, etc. of the bigger specimen 



