310 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



Pasak in Central Thailand ; the larger fish contained large eggs. The 

 species is characterized by seven wide, dark brown cross bands, which 

 meet dorsally and extend entirely across the body, two of the bands 

 being predorsal, one partly predorsal and partly subdorsal, one sub- 

 dorsal and three postdorsal, with a narrow black vertical bar at base of 

 caudal fin; short rostral barbels, none reaching eye; eight branched 

 dorsal rays ; and lateral line deficient on the caudal peduncle. 

 The largest specimen, the type, was 5 cm. long. 



Figure 64. — Noeviacheilus mcholsi H. M. Smith. Drawing by Luang Masya; courtesy of 



the Thailand Government. 



NOEMACHEILUS MENANENSIS, new species 



Figure 65 



Descnytion. — Form comparatively slender, body moderately com- 

 pressed posteriorly, cylindrical anteriorly; depth 6.0 in standard 

 length ; length of caudal peduncle 0.7 head and slightly more than its 

 depth; head 4.1 in length, bluntly pointed when viewed from above, 

 depressed, its width 0.7 its length, its depth at nape 0.6 its length; 

 eye in anterior half of head, 5 in head, 2 in snout, 1.5 in the flat inter- 

 orbital space ; snout 2.5 in head, its profile very slightly convex ; nostrils 

 nearer to eye than to tip of snout, the anterior tubular, the acutely 

 pointed flap reaching halfway to eye when depressed ; all barbels com- 

 paratively short, inner rostral barbel equal to eye, outer rostral barbel 

 1.5 times length of inner and not extending to vertical from anterior 

 edge of eye, maxillary barbel equal to outer rostral and reaching vertical 

 from posterior edge of eye ; mouth small, strongly arched, its width at 

 angles 1.5 times eye, lips moderately fleshy, posterior lip with a slight 



