198 BULLETIN 18 8, UNITED STATES NATIONAL MUSEUM 

 ACROSSOCHEILUS VITTATUS, new species 

 FiGUEE 33 



Deseription. — Depth 3.7 times in standard length; least depth of 

 caudal peduncle 1.4 in its length and 2.7 in head; head about 3.6 in 

 length; eye 3.5 in head, slightly less than interorbital space and 

 slightly greater than snout; two pairs of barbels, the maxillary ones 

 about equal to eye and somewhat longer than the rostral ones; four 

 or five irregular horizontal rows of tubercles extending from rostral 

 barbel to a point under posterior margin of eye, front of snout without 

 tubercles ; gill rakers on first arch 3 + 0. 



Squamation: Scales comparatively large; 24 in lateral line, 3.5-1- 

 2.5 in transverse line from midline of back to base of ventral fin, 9 pre- 

 dorsal, 12 circumpeduncular. 



Figure 33. — Acrossocheilus vittatus, new species: Type (U.S.N. M. No. 117749). 

 Drawn by Mrs. Alice C. Mullen. 



Fins: Origin of dorsal fin definitely in advance of ventrals, over 

 eighth scale of lateral line, midway between tip of snout and base of 

 caudal fin ; dorsal rays iii, 8 ; last simple ray weakly ossified, its length 

 1.3 in head; caudal fin shorter than head, deeply forked, the lobes 

 pointed; anal rays ii, 8, the longest, the second simple ray, equal to 

 ventral; ventral rays i, 8, extending to vent; pectoral rays i, 15, reach- 

 ing base of ventrals, somewhat less than height of dorsal. 



Coloration : Back and top of head light brown, some of the scales 

 of the back with dark bases ; a black band from head to base of caudal 

 fin, involving lateral-line scales and one row above; underside of head; 

 and body pale yellow ; membranes of dorsal fin with minute dark spots 

 and lines ; a submarginal longitudinal dark, stripe on eaclj caudal lobe ; 

 anal, ventral, and pectoral fins plain.. 



