FRESH- WATER FISHES OF SIAM, OR THAILAND 155 



2c. Scales in lateral line 38 to 43 ; scales between midline of back and lateral 

 line 7.5 or 8.5 ; scales between lateral line and origin of ventral fin 2.5 or 

 3; circumpeduncular scales 14. 

 4a. Origin of dorsal fin very slightly in advance of anal ; predorsal scales 

 21 to 25 ; body with 7 to 10 blackish transverse bands becoming round- 

 ish on caudal peduncle and often extending across lateral line anteri- 

 orly ; membranes of dorsal fin almost entirely black ; caudal fin un- 

 marked pulchellus 



4b. Origin of dorsal fin far in advance of anal ; predorsal scales 10 ; body 

 with 10 to 12 blackish transverse bands becoming roundish on caudal 

 peduncle and extending across lateral line ; membranes of dorsal fin 

 blackish along edges of rays in middle part of fin ; caudal fin with 3 



obscure dark cross bands infrafasciatus 



1&. No barbels, or a pair of maxillary barbels sometimes present in one species. 

 5o. Barbels absent ; origin of dorsal fin well in advance of anal fin. 



Ga. Scales in lateral line 34 ; maxillary extending under anterior border of 



eye ; 2 blackish cross bands on anterior part of body koratensis 



6&. Scales in lateral line 45 ; maxillary extending under center of eye ; 12 



steel-blue cross bands on body ornatus 



56. A pair of short maxillary barbels present or absent ; drtrsal fin entirely in 

 advance of anal fin; scales in lateral line 44 to 48; maxillary extending 

 well beyond eye ; several more or less irregular lengthwise rows of small 

 dark spots on back and side ; lower lobe of caudal fin with a broad dark 

 submarginal longitudinal band guttatus 



BARILIUS BERNATZIKI Koumans 



Barilius ternatzihi Koumans, 1937a, p. 61, fig. 1 (Kapa) . 



The only species of Barilius thus far recorded from Peninsular 

 Thailand is this one from the western part of the Peninsula north of 

 the island of Pucket. 



The type and only known specimen is 10.7 cm. long. 



The species seems well differentiated, having as an outstanding 

 feature only 31 scales in the lateral line, a lower number than in any 

 other species. The figure in Kouman's paper does not agree with the 

 description in the number of scales in the transverse series, the relative 

 length and depth of the caudal peduncle, the length of the barbels, 

 the point of origin of the dorsal fin, and the length of the anal rays. 



BARILIUS NANENSIS, new species 

 FlGTJBE 23 



Descriptioyi. — Dorsal profile from snout to dorsal fin nearly straight 

 and but little inclined; ventral outline moderately and regularly de- 

 curved from mouth to caudal peduncle ; depth 3.3 in standard length ; 

 least depth of caudal peduncle 1.5 in its length and somewhat less than 

 0.5 head ; head 4.2 in length ; eye about 3.2 in head, slightly less than 

 interorbital space; snout 0.8 eye; mouth very oblique, maxillary ex- 

 tending to a point under anterior edge of eye, tip of lower jaw when 



