162 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



26. Maxillary barbels one-fourth diameter of eye ; body with 5 narrow, well- 

 defined blackish longitudinal stripes following rows of scales of back and 

 side ; a dark elliptical spot on caudal peduncle ; edge of dorsal fin black ; 



interradial membranes of dorsal fin blackish medianly lineatus 



16. Barbels absent. 



3o. Scales in lateral line 53 to 60 ; scales in transverse series 12-1-8 or 9 ; scales 

 ai'ound caudal peduncle 28 or 30 ; ventral fins with no dark edge. 



microlepis 



36. Scales in lateral line 32 to 34; scales in transverse series 6-1-5; scales 

 around caudal peduncle about 14; ventral fins with a sharply defined 

 dark edge marginipinnis 



CIRRHINUS JULLIENI Sanvage 



Cirrhina jullieni Sauvage, ISTSb, p. 237 (Cambodia, French Indo-China) ; 1881, 



p. 174, pi. 6, fig. 2 (Laos, French Indo-China). 

 Cirrjiimis jullieni Fowler, 1934a, p. 115 (Bangkok, Chiengmai, Chiengsen) ; 



1935a, p. 122, figs. 63, 64 (Bangkok) ; 1935b, p. 510 (Old Chiengsen) ; 1937, p. 



173 (Bangkok, Mepoon, Pitsanulok, Kemarat). 



Described in 1878 from the Mekong in Laos, this species has been 

 found in various parts of Central, Northern, and Eastern Thailand, 

 being especially common in tributaries of the upper Menam Chao 

 Phya. 



This fish reaches a length of 20 cm. A specimen 17.2 cm. long taken 

 September 8, 1934, in a canal in front of the writer's residence in Bang- 

 kok, was a female with ripe eggs; the lateral-line scales were M, the 

 transverse scales to ventral base 5.5-1-4, the predorsal scales 10, and 

 the circumpeduncular scales 20 ; there were no barbels ; the lips were 

 not fringed ; the free edge of the dorsal rays was black and the inter- 

 radial dorsal membranes had dark areas. 



Apparently no specimens have been taken in local waters that agree 

 fully with Sauvage's descriptions, which called for a pair of rostral 

 barbels, fringed lips, and 4.5 or 5 rows of scales between the lateral line 

 and the base of the ventral fin. In Thailand the species normally has 

 a pair of short maxillary barbels, which are concealed in the postlabial 

 grooves. Specimens are met with, however, in which the barbels are 

 altogether absent or are represented by mere rudiments. The original 

 description referred only to superior, that is, rostral barbels, shorter 

 than the eye, but no barbels are shown in Sauvage's plate accompany- 

 ing his 1881 report, and no rostral barbels have been found in Siamese 

 specimens. A fringed margin of the lips is mentioned in Sauvage's 

 supplementary account, but this seems a variable feature as it has not 

 been observed in local specimens. A half-grown specimen of Cir~ 

 rhinus jullieni in the British Museum from the Bangpakong examined 

 by Dr. Ethelwynn Trewavas was ascertained to have no barbels and 

 no fringes on the lips. 



