312 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



specimens, in which the cross bands show quite distinctly, there is 

 seen considerable variation in number, ranging from 7 to 14. In the 

 few specimens in which the cross bands are as few as T, they are wide, 

 and the pigmentation is more diffuse than in the specimens having 

 more numerous cross bands. 



This species was found in close association with N. atriceps and 

 shows a remarkable resemblance thereto in the sharply defined dark 

 head (not met with in other local species) and in the general colora- 

 tion of body and fins. There is, however, a marked difference in the 

 length of the head, the length and shape of the snout, the width of 

 the mouth, squamation, and number of branched dorsal rays, which 

 are always 8 in this species and 9 in A^. atriceps. 



NOEMACHEILUS ATRICEPS, new species 

 FiGTJBE 66 



Description. — Body moderately elongate and compressed, profile 

 from nape to dorsal fin slightly inclined and nearly straight; depth 

 5.3 in standard length, somewhat over 6 in total length ; depth of caudal 

 peduncle equal to its length, and 1.4 in head ; head short, 4.6 in length, 

 its dorsal profile rising abruptly from tip of snout to eye; head mod- 



:=^S.' 



Figure 66. — Noemacheilus atriceps, new species: Type (U.S.N.M. No. 117750). Drawn by 



Mrs. Alice C. Mullen. 



erately depressed, its depth at nape 1.5 in its length and its width 1.2 

 in its length ; snout short, blunt, strongly arched, evenly rounded when 

 viewed from above, 2.4 in head ; eyes extending to dorsal profile, 5.5 in 

 head, 2.1 in snout, 1.8 in the flat interorbital space, and a very little 

 nearer to gill opening than tip of snout ; nostrils nearer to eye than to 

 tip of snout, separated by a short flap which does not reach eye ; mouth 

 lunate, twice diameter of eye, surrounded by rather thin, broad, flat- 

 tened lips, lower lip with a slight median incision, the inner ends of the 

 postlabial grooves separated by a space shorter than diameter of eye; 

 outer rostral barbel 1.5 times length of inner barbel, reaching vertical 

 from anterior margin of eye and extending slightly beyond base of 



