FRESH-WATER FISHES OF SlAM, OR THAILAND 245 



by numerous dark longitudinal lines following the rows of scales; 

 and there are two blackish transverse bars on the caudal peduncle. 



LOBOCHEILUS DAVISI (Fowler) 



Tylognathus davisi Fowlee, 1937, p. 208, figs. 179, 180 (Kemarat). 



Known from one specimen, 7.8 cm. long, from the Mekong at 

 Kemarat, Eastern Thailand, this species has no outstanding features. 

 The only marks on the body are about eight indistinct dark longi- 

 tudinal lines on the back and side following the rows of scales, the line 

 above the lateral line being darker on the caudal peduncle and ending 

 in an elongate spot. 



LOBOCHEILUS RHABDOURA (Fowler) 



Tylognathus rhabdoura Fowler, 1934a, p. 133, figs. 99, 100 (Chiengmai). 



The writer first met with this fish in 1923 when, on November 25, 

 a specimen 6 cm. long was taken in the Menam Chao Phya at Bang 

 Pang, Central Thailand. He next obtained 4 specimens, 5.7 to 6.8 

 cm. long, on November 25, 1928, in the Meping at Chiengmai. They 

 were brilliant silvery, with a black longitudinal stripe in the posterior 

 part of the body ending in a blotch on the caudal peduncle. The 

 Meping at Chiengmai yielded another specimen, 6 cm. long, on De- 

 cember 19, 1932. Fowler's type, 7.2 cm. long, and numerous other 

 specimens, 3 to 6.9 cm. long, in the de Schauensee collection came 

 from the same locality. Phya Daruphan Pithaks, chief conservator 

 of forests in Thailand, collected specimens in the Mesoi at Lampang, 

 Central district. 



This is a slender species (depth 4.2 to 4.5 in standard length), with 

 a pair of minute maxillary barbels, the lower lip papillate, 32 to 34 

 scales in the lateral line, 6 to 6.5-1-3 scales in transverse series and 

 10 predorsal scales. 



LOBOCHEILUS CHEVEYI. new species 

 FiGUBE 45 



Description. — Depth of body 4.5 in standard length; least depth 

 of caudal peduncle slightly more than 0.5 its length and 0.5 depth 

 of body ; profile from snout to dorsal fin gently arched, ventral pro- 

 file less curved than dorsal ; head 4.3 in length, its depth and breadth 

 about equal; snout 2.5 in head, its anterior surface rising obliquely 

 from the wide mouth, which extends backward to a point under 

 nostrils, its width 1.5 times eye and slightly less than snout; upper 

 lip smooth, lower lip with its superficial part broad, full, anteriorly 

 beset with low papillae; a pair of maxillary barbels 0.5 eye; eye in 



590087 — 45 17 



