igig.] B. L. Chaudhuri : Fish from Burma. 285 



there is a series of openings of mucuous glands, the largest of 

 which is far forward and is directly under the chin. The surface of 

 the posterior portion of the gular plate has slight corrugations 

 which ma}^ possess some adhesive function ; in places on it, 

 as well as on the edge of the gill membrane round it, there are 

 coriaceous patches which probablj- help the fish to stick against 

 the force of the current. 



There are fifteen scales in front of the dorsal fin {i.e. from the 

 snout to the anterior end of that fin), and six scales between the 

 hind margin of the orbit and the pre-opercle ; there are the same 

 number of scales between the last ra\' of the dorsal fin and the root 

 of the caudal. The number of ra3^s in the dorsal fin is thirty-eight, 

 none of which are divided ; the height of the longest ray (which is 

 the seventh from the last) is contained eight times in the total 

 length. The distance between the tip of the snout and the root 

 of the pectoral fin is contained three and a half times in the total 

 length, and the length of the pectoral fin five times. The latter 

 has twelve flat ra3^s. The anal fin commences one scale behind 

 the vent and has twenty-eight undivided rays ; the seventh ray 

 from behind being the highest — nearh* as high as the highest ra}' 

 in the dorsal fin. The length of the caudal peduncle is equal to its 

 height ; there are nine scales between the last ray of the anal and 

 the root of the caudal and eighteen scales round the caudal peduncle. 

 The caudal fin is fan-shaped and consists of twelve rays ; the 

 middle rays are the longest ; their length is contained nearly six 

 times in the total length and they are just twice as long as the height 

 of the root of the caudal fin. 



There are fifty-one scales in the lateral line of which fifty scales 

 are perforated ; the line bends down after twelve scales and then, 

 with one unperforated scale intervening, continues to the root of 

 the caudal with thirty-seven perforated scales. In the transverse 

 series there are three rows of scales above the anterior twelve per- 

 forated scales and seven row\5 below this and above the mid-ventral 

 line. In the posterior portion of the lateral line there are four 

 transverse rows above and five and half rows below. There are 

 twenty scales in the mid-ventral line between the posterior end of 

 the gular plate and the vent. 



Measurements in hundredths of total length without caudal fin : — 



Depth of body ... ... ... ... I■ 



Depth of caudal peduncle 

 Length of head 

 Depth of head 

 Width of head 

 Length of snout 

 Diameter of orbit 

 Width of interorbital space 



Distance from tip of snout to anterior root of dorsal fin 

 Height of longest dorsal rays 



Distance from tip of snout to root of pectoral fin ... 

 Length of pectoral fin 

 Distance from tip of snout to vent 

 Distance from tip of snout to anterior root of anal fin 

 Height of longest anal rays 



10-3 

 26-4 



1 8-8 

 4-7 

 47 

 9*4 



35 



I 2'2 



28-3 

 17 



49 



5n'94 

 II '3 



