328 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



Fins : Origin of dorsal fin slightly in advance of origin of ventrals, 

 about midway between tip of snout and base of caudal fin; dorsal 

 rays iii, 8, longest branched ray 1.8 in head; caudal slightly incised, 

 its length 1.4 in head; anal rays iii, 5, longest less than 0.5 head, nearly 

 reaching base of caudal ; ventrals as long as dorsal, not quite reaching 

 ventral aperture; pectoral rays i, 10, the fin rounded, 1.6 in head and 

 extending 0.6 distance between pectoral and ventral bases. 



Coloration : Entire head and body pale greenish brown, somewhat 

 lighter below; no markings; fins plain, the dorsal rays dark greenish. 



Type mid paratypes. — The type (U.S.N.M. No. 107942), a female, 

 12.1 cm. long, with well-developed eggs, was taken by H. G. Deignan, 

 April 26, 1936, in Huey Nam Puat, a clear mountain brook, at Ben 

 Nam Puat, in French Laos ; the stream ultimately reaches the Mekong. 

 A male paratype (U.S.N.M. No. 107896), 12 cm. long, agrees in all 

 respects with the type but with very faint evidence of several dark 

 cross bands posterior to origin of anal fin, these marks visible on 

 only one side. Another paratype is U.S.N.M. No. 107945. 



Remarks. — Aside from its comparatively large size and pale color, 

 this species may be recognized easily by its very full and protruding 

 cheeks and its acutely pointed snout. 



The vestiges of transverse bands observable on the male specimen 

 suggest that the young may be marked with distinct cross bands, which 

 become obsolete or disappear entirely in the larger adults. 



NOEMACHEILUS BINOTATUS H. M. Smith 



Figure 75 



.Nemacheilus hinotatus Smith, 1933a, p. 01, pi. 1, fig. 4 (Mtkhan). — Fowlek, 1934a, 

 p. 104 (Chiengmai). 



This species is known only from the Meping and tributaries in 

 Northern Thailand. The type and cotype, 5.2 and 4.5 cm. long, were 

 collected in the Mekhan, a picturesque mountain stream, at a point 

 where it lies southwest of Chiengmai. Fowler had numerous speci- 

 mens, 1.4 to 3.8 cm. long, from the Meping at Chiengmai. 



Figure 75. — Noemachsilus binotaius H. M. Smith. Drawn by Luang Masya; courtesy of 



the Thailand Government. 



