II 



on head and body of equal size. Twenty to 22 transversal 

 rows on praeoperculum. A double series of 37 45 spines 

 along the abdomen. First branchial arch with 1 1 stout gill- 

 rakers, spinous at the innerside, longer than branchial fila- 

 ments, about 3 / 4 of eye, and below these a series of ten blunt 

 short protuberances at the innerside. More or less silvery, 

 back dark; when young sometimes with more than 20 oblique 

 double silvery transverse stripes. Pectorals and ventrals hya- 

 line, dorsal, anal and caudal dark. Axil of pectorals black. 

 Rarely dark spots or a series of 4 or 5 black patches in the 

 caudal region. Length 875 mm. 



Nom. indig. : Lopis, Kapirat (Mai.). 



Habitat: Java (Batavia, Samarang); Sumatra (Palembang, 

 Gunung Sahilan !, Djambi !, Deli); Nias!; Borneo (Banjer- 

 massin, Pengaron Sintang, Djonkong !, rivers Mahakam and 

 Kapuas). -- Siam; Burmah; Lower Bengal to Sind. 



In freshwater. 



3. Notopterus borneensis Blkr. 



Notoptcrus borneensis Bleeker. Nat. Tijdschr. Ned; Indie. II. 1851, p. 437. 

 Notopterus maculosus Bleeker. Nat. Tijdschr. Ned. Indie. II. 1851, p. 438. 

 Notoptcrus borneensis Bleeker. Atl. Ichth. VI. 1866 1872, p. 147. 

 Notopterus borneensis Giinther. Cat. Brit. Mus. VII. 1868, p. 479. 

 Notopterus borneensis Volz. Zool. Jahrb. Abt. Syst. XIX. 1903, p. 410. 

 Notopterus borneensis Fowler. Proc. Acad. Nat. Sc. Philad. (2). LVIII. 1905, 

 p. 489- 



B. 8; D. 910; A. 112124; P. 1617; V. 45; L. tr. 

 about 75 (in a vertical line through origin of anal). 



Oblong, compressed. Dorsal profile convex between vertex 

 and dorsal. Upper profile of head concave. Height 3 2 / 3 4, 

 head 4 3 / 4 5, eye 4 3 / 4 5, longer than snout. Maxillary rea- 

 ching to hindborder of eye or a little farther, 2 ! / 4 2 ! / 2 in 

 length of head. Lower border of suborbital bone, lower border 

 and ridge on praeoperculum slightly serrated. Origin of dorsal 

 about midway between snout and base of caudal in young 

 specimens, in adults midway between eye and base of caudal. 

 Pectorals as long as or shorter than postorbital part of head. 

 Scales on opercles not larger than those on body, 12 16 

 transversal rows on praeoperculum. A double series of 37 41 

 spines along the abdomen. Gillrakers unknown. Grayish silvery, 



