22 Records of the Indian Museum. [Vol. VI., 



Air-bladder. — An oval-shaped free sac not enclosed in a bony 

 capsule, but lying superior to the heart and extending posteriorly ; 

 it is lodged under a flat osseous roof and is in direct contact on 

 the two lateral sides with the stretched thin membranes, concealed 

 as it were by the anterior black blotches behind the gill-clefts — 

 suggesting some connection with the production and transmission 

 of sound. 



Colour. — Dorsal and upper part of the body dark brown, 

 with lighter or paler whitish brown stripes: one median, from the 

 tip of the snout to the base of the dorsal spine, and two lateral 

 longitudinal on each side, one above and the other below the 

 middle line, which is distinguished by being dotted black for the 

 openings of the lateral organs. The upper of the two lateral longi- 

 tudinal stripes is the darker of the two. There are on each side two 

 large, conspicuous and intensely black circular blotches considerably 

 larger than the eyes, one behind the gill-cleft covering and thereby 

 concealing the thin membranous skin of the body where the 

 air-bladder is in direct contact with the membranous leathery 

 covering and thus with the outside water, and the other about the 

 middle of the caudal peduncle, being separated from the root of 

 the caudal fin by a thin white band that runs along the root. 

 The ventral side of the body is coloured dirt}^ silver ; the lips, 

 mandibular barbels^ and the thin band at the root of the caudal 

 are all white, the nasal and the maxillary barbels blackish brown, 

 adipose dorsal dark brown and the dorsal, anal and caudal fins 

 are brownish with black spots on the membranes between the 

 rays. 



There are altogether four specimens measuring from 60 to 67 

 mm. (including caudal fin), all collected in the district of Bhamo 

 close to the Yunnan border. This new species differs in propor- 

 tions, coloration, etc., from Macrones niedianalis, Regan, reported 

 from Yunnan, and also from Macrones bleekeri and M. blythii, 

 reported among other places from Burma also. To these the new 

 species has some superficial resemblance. The principal differences 

 are summarised in the following table : — 



M. niedianalis. M. bleekeri. M. blythii. M. pnlcher. 

 Length of head in total 



length .. .. 31—4^ 5i— 5i 5 Zk—ll 



Height of body in the total 



length .. .. 5i— 51 5 5 3* 



Length of head in diameter 



of eye .. ..5 — 6| 4^ 3i 3|— 4i 



Length of dorsal spine in 



the length of head .. li — ii 2 Little less if 



than 2 



Besides the above differences, among others the new species 

 differs from M. bleekeri in having the length of the base of the 

 adipose dorsal i\ in the length of head, whereas in M. bleekeri it 

 is 2, and in having both the lobes of the caudal fin equal, whereas 

 in M. bleekeri the superior lobe of the caudal fin is much longer 

 than the inferior lobe. 



