252 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



commissure, anterior surface thickly beset with minute pores; free 

 margin of snout with small, indistinct plicae; eye in midlength of 

 head, 4 in head, 1.7 in snout, and 2 in the slightly convex interorbital 

 space; mouth strongly arched, its width equal to eye, its posterior 

 angle in advance of vertical from nostrils ; upper lip narrow centrally, 

 wide and thickened laterally, where it is uncovered by the rostral fold, 

 its posterior expanded end, occupying a deep groove, bearing an ir- 

 regular fringe ; lower lip thick, its free margin with a row of widely 

 spaced conical papillae and several inner rows of minute papillae, 

 the lateral parts of the lip covered by the upper lip, the deep post- 

 labial grooves nearly meeting centrally; a pair of minute rostral bar- 

 bels and a pair of well-developed flat maxillary barbels concealed in 

 the lateral groove ; branchial openings extending to a point posterior 

 to eyes, isthmus wider than eye; gill rakers very short, slender, and 

 numerous. 





lA.. 



Figure 46. — Labeo indramontri, new species: Type (U.S.N.M. No. 107964). Drawn by- 

 Mrs. Alice C. Mullen. 



Squamation : Tube-bearing scales of lateral line 43 ; scales in trans- 

 verse series from origin of dorsal of base of ventrals 8.5-1-5 ; preclorsal 

 scales 15 ; scales around narrowest part of caudal peduncle 20. 



Fins : Origin of dorsal fin over tenth scale of lateral line, midway 

 between tip of snout and middle of base of anal fin; dorsal margin 

 concave, its rays ii, 11, the first branched ray shorter than head ; caudal 

 longer than head, deeply forked, the lobes pointed, central rays one- 

 third length of outer; anal rays iii, 5, the first branched ray 1.5 in 

 head ; ventrals and pectorals subequal, 1.4 in head, pectoral rays i, 14. 



Coloration : Back and top of head light olive ; below whitish ; ob- 

 scure narrow dark longitudinal stripes on back and sides following 

 rows of scales ; anterior margin of dorsal fin with a blackish line from 

 base to tip, dorsal membranes dusky; other fins plain. 



