FRESH-WATER FISHES OF SIAM, OR THAILAND 305 



12c. Thirteen dark brown cross bands wider than interspaces, 

 5 predorsal, 3 subdorsal, 5 postdorsal, the bands not sharply 

 defined ; top of head without black or dark spots ; origin of 

 dorsal fin midway between tip of snout and base of caudal fin ; 

 width of head 1.1 in its length ; caudal peduncle as deep 



as long obscurus 



12d. Thirteen dark brown cross bands about width of interspaces, 

 each band with a narrow darker margin, 5 predorsal, 3 sub- 

 dorsal, 5 postdorsal ; top of head with obscure dark spots ; 

 origin of dorsal fin nearer to base of caiidal fin than to tip 

 of snout ; width of head 1.4 to 1.87 in its length ; caudal 



peduncle deeper than long waltoni 



12e. Fourteen to eighteen black cross bands about width of inter- 

 spaces, usually 5 predoi-sal, 3 subdorsal, and 7 postdorsal; 

 top of head mottled ; dorsal fin with a jet black spot at its 

 anterior base and another at its midbase; origin of dorsal 

 midway between tip of snout and base of caudal fin ; width 

 of head 1.4 in its length; caudal peduncle as deep as 



long schultzi 



10&. Nasal tentacle long, reaching to middle of eye ; 13 dark brown cross 

 bands wider than interspaces, 6 predorsal, 2 subdorsal, 5 post- 

 dorsal ; origin of dorsal fin midway between nostrils and base of 

 caudal fin ; width of head 1.4 in its length ; caudal peduncle deeper 



than long deignani 



4d. Dark cross bands on body 17 to 23. 



13a. Lateral line incomplete, terminating anteriorly to anal fin ; origin 

 of dorsal fin over base of ventral fins ; cross bands 17, about width 

 of interspaces, 6 predorsal, 3 subdorsal, 8 postdorsal, together 

 with a black band at base of caudal fin ; a black area at beginning 



of lateral line extending to axil of pectoral kohchangensis 



136. Lateral line complete; origin of dorsal fin in advance of base of 

 ventrals ; cross bands about 23, about width of interspaces, the 

 bands anterior to and under dorsal fin about 18, much narrower 

 than those posterior to fin which number 5, together with a nar- 

 row black band at base of caudal fin multif asciatus 



4e. Dark cross bands on body about 34 ; lateral line complete ; origin of 

 dorsal fin over base of ventrals ; cross bands under and before dorsal 

 fin about 25, much narrower than postdorsal bands, which number 

 about 9; predorsal region with about 6 dark brown transverse 

 saddles; at base of caudal fin a crescentic or lunate jet-black band 

 not reaching dorsal and ventral profiles, near its upper end a black 



saddlelike spot on caudal fulcra poculi 



3&. No black cross band at base of caudal fin ; a jet-black spot at midbase 

 of caudal rays in a yellow area ; back with 14 to 20 dark saddles, 

 side with same number of dark spots along lateral line ; body slender, 

 depth 7 in standard length ; all barbels longer than in other local 

 species; a preorbital hook (in male) ; caudal fin deeply forked, lobes 



pointed, upper lobe longer masyae 



26. Cross bands narrow, pale, 11 to 14, separated by much wider dark brown 

 interspaces ; a conspicuous black bar below eye ; all barbels compara- 

 tively long ; caudal fin much longer than head, deeply forked, lobes 

 pointed translineatus 



