222 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



While the various species enter into commerce, none of them has 

 a noteworthy food vahie. 



The general vernacular name is fla set. According to some informa- 

 tion from Thai sources, sa may be an onomatopoeic name, repre- 

 senting the sound made by the fish when they come to the surface and 

 take in and blow out water and bubbles as a part of their respiratory 

 function. 



Seven species are known in the fauna of Thailand : 



la. Circumpeduncular scales 16. 



2a. Head small, 5.5 in standard length; maxillary barbel equal to eye; pores 

 on snout not described ; longest dorsal ray less than depth of body ; 

 I)ectoral fins as long as head; body with dark longitudinal streaks fol- 

 lowing rows of scales burmanicus 



26. Head larger, 4.4 to 4.5 in standard length. 

 3a. Maxillary barbel much longer than eye; numerous small pores or tuber.--, 

 cles on pores on front of snout ; longest dorsal ray equal to depth of 

 body ; pectoral fins longer than head ; a dark band along side of body ; 



a dark band along middle of back sumatranus 



3&. Maxillary barbel equal to or shorter than eye ; 2 transverse rows of large 

 pores or tubercles on pores on front of snout ; longest dorsal ray much 

 less than depth of body ; pectoral fins as long as head ; body with 

 6 to 9 black stripes following lines of scales ; no dark median dorsal 



band lineatus 



16. Circumpeduncular scales 20; scales in lateral line 43 to 45; scales in trans- 

 verse line to base of ventral fin 7.5 or 8-1-5 or 5.5 ; maxillary barbel longer 

 than eye. 

 4a. Several rows .of large pores on front of snout ; pectoral fin shorter than 

 head ; a black diamond-shaped spot on side over middle of pectoral 

 fin, center of spot uncolored ; a large round black spot on caudal 



peduncle spilopleura 



46. A single row of pores on front of snout ; pectoral fin as long as head ; a 

 black spot on each scale of back and side forming interrupted longi- 

 tudinal lines ; no mark on side over pectoral fin ; a round black spot 



on caudal peduncle siamensis 



Ic. Circumpeduncular scales 18 to 22 ; scales in lateral line 39 to 41 ; scales in 

 transverse line to base of ventral fin 6.5 to 8.5-1-5 to 6 ; several series of 

 pores on front of snout; body with longitudinal dark lines following rows 

 of scales ; usually a round dark spot on caudal peduncle. 



5a. Length of head 4.7 to 5.2 in standard length leptocheilus " 



56. Length of head 4.2 to 4.3 in standard length kuhlii 



LABIOBARBUS BURMANICUS (Day) 



Dangila burma^iica Bay, 1878, vol. 2, p. 516 (Moulmein, Tanoy). — Smith, 1933a, 

 p. 80 (Patani River). 



The only Thailand record for this Burmese species is for the Patani 

 River at Patani, in the Peninsula, where a male specimen 14.5 cm. 

 long was taken in a cast net October 15, 1923. The specimen agreed 

 closely with Day's description and figure. 



In describing this fish from Tanoy and Moulmein from specimens 

 up to 10 inches in length. Day stated that it was closely allied to 



