FRESH- WATER FISHES OF SlAM, OR THAILAND 271 



ated from boats. It is hardly an exaggeration to state that during this 

 run, which lasts several weeks, every household along the main water 

 courses has in use some kind of fishing appliance. The catch is utilized 

 as food for human beings and domestic animals and, in places where 

 the fishing is concentrated, for the trying out of oil in small vats ar- 

 ranged in rows along the river bank. 



Young examples from the Sikuk River sent to the British Museum 

 were courteously examined by J. R. Norman who wrote : "The species 

 is a Crossochilus^ and is probably identical with G. reha (Ham. Buch.) , 

 a widely distributed species in India and Burma. We have one young 

 specimen of G. reba from Siani (Mouhot collection), which agi'ees very 

 closely with those sent by you." 



It should be pointed out that fresh specimens show no line of 

 demarcation between the snout and the upper lip, as given by Weber 

 and de Beaufort as a generic character. 



G rossocJieilus reba shares with Girrhinus and other cyprinoids the 

 name pJa sol, applied to the young fishes that in large numbers under- 

 take the annual upstream movement. 



CROSSOCHEILUS CAUDIGUTTATUS Fowler 



Crossocheiliis caudiguttatus Fowler, 1934a, p. 137, fig. 103 (Chiengmai). 



Described from four specimens, 3.8 to 8.2 cm. long, taken at Chieng- 

 mai, presumably from the Meping, this species has not been met with 

 elsewhere in Thailand. It is peculiar among the local members of 

 the genus in having a pair of maxillary barbels. The dorsal fin has a 

 sharply defined narrow dark edge and a black blotch on the median 

 part of each membrane. 



CROSSOCHEILUS COBITIS (Sleeker) 



Lohocheilos cobitis Bleeicek, 1853 (86), p. 523 (Padang; Batavia). 



This is the only local species of Grossocheilus having both rostral and 

 maxillary barbels. It has heretofore been known from Java, Borneo, 

 and Sumatra. A specimen, 5.3 cm. long, typical in all respects, was 

 taken in Bung Borapet, Central Thailand, in March 1933. The species 

 seems to be very rare in that country. 



Genus MEKONGINA Fowler 



Mekongina Fowlee, Proc. Acad. Nat. Sci. Philadelphia, vol. 89, p. 200, 1937. 

 (Type, Mekongina erythrospUa Fowler.) 



The outstanding features of the genus Mekongina are the absence 

 of a rostral fold and the continuation of the skin of the rostrum as 

 the upper lip ; snout with 4 or 5 rows of tubercles arising from crater- 

 like pores; upper lip papillate and fringed, and completely covering 

 the gape when the mouth is closed ; upper lip not connected with lower 



