FRESH-WATER FISHES OF SIAM, OR THAILAND 



243 



craterlike depressions, a deep horizontal groove on each side dividing 

 the tubercles into groups with two rows in each group, the upper 

 group consisting of a central part and a lateral part that extends 

 backward as far as nostrils, the lower group reaching halfway to 

 corner of mouth ; eye small, five in head, 2.4 in snout and in the broad 

 slightly convex interorbital space, placed in upper half of head and 

 nearer to posterior margin of head than to tip of snout ; mouth occu- 

 pying full width of head, twice diameter of eye ; upper lip thick, its 

 base partly covered centrally by the pendulous rostral fold, the free 

 edge of which is entire, superficial part of lower lip thick, ellipsoidal, 

 anteriorly papillose, its antero-posterior diameter equal to eye, deep 

 j)art of lower lip closely adherent to lower jaw, which has a prominent 

 horny sheath; a pair of maxillary barbels less than diameter of eye; 

 pharyngeal teeth 5,4,2-2,4,5, slender, compressed, crowded feebly un- 

 cinate, with narrow grinding surface ; gill rakers short, slender, feeble, 

 about 5 + 31 on first arch. 



Figure 44. — Lobocheilus cornutus, new species: Type (U.S.N.M. No. 107957). Drawn by- 

 Mrs. Alice C. Mullen. 



Squamation : Tubule-bearing scales in lateral line 35 ; scales in trans- 

 verse series from midline of back to midline of abdomen 5.5-1-4, with 

 3.5 scales between lateral line and base of ventral fin ; predorsal scales 

 11 ; rows of scales around narrowest part of caudal peduncle 16. 



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

 advance of ventrals; dorsal emarginate, rays iii,8, longest branched 

 ray 0.9 head ; caudal deeply forked, lobes pointed, longer than head ; 

 anal emarginate, rays iii,5; ventrals arising under twelfth scale of 

 lateral line, longest ray 1.5 in l?ead; pectorals slightly longer than 

 ventrals. 



Coloration : Silvery brown on back and sides, under parts whitish ; 

 five narrow dark brown longitudinal stripes along side posteriorly, 

 the median stripe longest and most distinct, extending from over tip 

 of pectoral fin to caudal base; fins plain. 



