140 



BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



fin 35-1-2, predorsal scales 9 ; circumpedimcular scales 12 ; rostral bar- 

 bel equal to diameter of eye, maxillary barbel a third longer. 



Fowler reported a specimen, 5 cm. long, from the Metang, north of 

 Chiengmai, presumably from the Meping; and two, 29 and 31.5 cm. 

 long, from Keng Sok, in the Southeastern division. 



Figure 17. — Tor soro (Cuvier and Valenciennes). Drawn by Nai Chote Suvatti; cour- 

 tesy of the Thailand Government. 



A single specimen, 8.2 cm. long, obtained by Deignan on October 22, 

 1936, from Huey Mekong Kha, a tributary of the Salwin at the base of 

 Doi Mekong Kha, is referred to this species, otherwise not known from 

 the Salwin. In the absence of a median lobe on the lower lip, in 

 squamation, fin formulae, and in other characters it cannot be other- 

 wise allocated. A double row of low, widely spaced tubercles extends 

 from snout along cheek to under middle of eye. 



In the East Indies a length of nearly 1 meter is attained. 



Among the people on Kao Sabap, this fish bears the name pla pluang 

 hin. 



Genus CYCLOCHEILICHTHYS Bleeker 



Cpclocheilichthys Bleekee (201), Nat. Tljdschr. Netlerl. -Indie, vol. 20, p. 431, 

 1859-60. (Type, Cy cloche iliclithys armatus Bleeker.) 



The fishes of this genus are numerously represented as to species in 

 Thailand and some are abundant and an important element in the food 

 supply of the people living along the larger rivers. The outstanding 

 generic characters are: Mouth small, subinferior; lips entire and con- 

 tinuous around corners of mouth; a continuous groove posterior to 

 lower lip; barbels 4, 2, or none; head with numerous sensory folds in 

 parallel groups; lateral line with less than 50 scales; 8 branched dorsal 

 rays, last simple ray osseous and strongly denticulated. Some of the 

 species are not sharply differentiated and are based on a combination 

 of minor characters rather than on outstanding features such as are 



