FRESH-WATER FISHES OF SIAM, OR THAILAND 309 



Fins : Origin of dorsal fin over origin of ventrals, a little closer to 

 base of caudal fin than to tip of snout ; rays iii,8, longest rays slightly 

 more than half length of head; caudal fin moderately emarginate, 

 somewhat shorter than head; anal rays ii,5, longest equal to longest 

 dorsal rays; ventrals reaching anal opening, rays i,7; pectorals 1.5 

 times as long as ventrals, 1.2 in head, rays i,10. 



Coloration : General color pale creamy yellow ; body with nine dark 

 brown cross bands meeting over back, equal to or wider than inter- 

 spaces, three predorsal, two wholly or partly subdorsal, four postdorsal, 

 together with a narrow jet-black cross band at base of caudal fin ; top of 

 head mottled, cheeks yellowish brown ; dorsal fin with two large black 

 spots at base, rays brownish, membranes hyaline ; other fins plain. 



■'"^^Irm-^^n^^s 



Figure 63. — Noemacheilus breviceps, new species: Type (U.S.N.M. No. 117751). 

 Drawn by Mrs. Alice C. Mullen. 



Type.—K specimen (U.S.N.M. No. 117751), 7.2 cm long, taken by 

 H. G. Deignan December 26, 1936, in the Menam Mao, a tributary of 

 the Menam Fang, an affluent of the Mekong, Northern Thailand. 



Remarks. — At the place and time of capture of this specimen, the 

 Menam Mao was a clear torrent at the foot of a mountain. 



The species is characterized by its comparatively short head, abruptly 

 decurved snout, swollen cheeks, small eyes, short barbels, and pattern 

 of coloration. Its relations with other local species are shown in the 

 key. 



NOEMACHEILUS NICHOLSI H. M. Smith 

 FlQUBE 64 



Nemacheilus nicholsi Smith, 1933a, p. 53, fig. 1, pi. 1, fig. 1 (Pak Jong). — Fowlek, 

 1934a, p. 105 (Bua Yai). 



Originally known only from a small mountain stream, tributary of 

 the Menam Mun, near Pak Jong, Eastern Thailand, this fish has since 

 been found at Bua Yai, also in Eastern Thailand. Two specimens 4.3 

 and 4.7 cm. long were taken in Lam Tong Lang, a tributary of the 



590087—45 21 



