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length of head. Pectorals and ventrals subequal and equal to 

 length of head. Origin of ventrals opposite to about 15th scale 

 of lateral line and third branched dorsal ray, separated by 8 

 scales from the lateral line. Ventrals surpassing anus. Caudal 

 deeply emarginate, the lobes rounded, longer than head. Least 

 height of caudal peduncle about 1.7 in length of head, shorter 

 than its own length, surrounded by 24 — 26 scales. With 

 numerous silvery small spots, irregularly scattered. A large 

 transverse black blotch on the side of the anterior part of the 

 body. In young ones a round black spot near the base of the 

 caudal. Fins blackish, their base may be pink. Length 370 mm. 



No men. indig. Aro (Palembang). 



Habitat: Sumatra (Palembang!, Indragiri, Danau Sialong 

 lotong, Djambi!); Borneo (river Kapuas: Pontianak, Mandhor, 

 Danau Sriang; river Kahajan; river Barito : Banjermassin; river 

 Baram) ; Singapore. — Siam. 



3. Osteochilus kelabau Popta. 



Osteochilus kelabau Popta, Notes Leyden Mus. XXIV. 1904, p. 196. — Ibid. 

 XXVII. 1906, p. 99. 



D. 3-15—16; A. 3.5; p. 1. 16-17; V. 1.8; L. 1. 38-39; 



7^-8 

 L. tr. "~T~ . 

 7f-81 

 Height 3 or less, 4 or less in length with caudal. Head 4 

 or more, 5 or more in length with caudal. Eye in large specimens 

 3.5 to more than 4, much shorter than snout, twice or more 

 in the interorbital space, situated about in the middle of the 

 length of the head. Snout blunt, not prominent, without pores. 

 Lower jaw very strongly ascending from chin. Maxillary 

 barbels longer than eye, the rostral ones somewhat shorter. 

 Origin of dorsal opposite to 9th or loth scale of lateral line, 

 separated by 13 — 16 scales from occiput. Anterior rays of 

 dorsal not or much prolonged, in the last case about equal to 

 height, ending above or behind origin of anal. Anal with the 

 anterior rays more or less prolonged, in the first case reaching 

 on caudal, their length more than that of head. Origin of anal 

 opposite to 24tt or 25th scale of lateral line and to 15th branched 

 dorsal ray. Ventrals and pectorals subequal, or the outer rays 

 of the ventrals prolonged and nearly reaching anal. Their 

 origin separated by 5 — 5Y2 scales from 12th scale of lateral 



