138 



nearly reaching caudal, its height nearly equal to head. 

 Origin of anal opposite to 2it scale of lateral line and to 

 1 3th branched dorsal ray. Ventrals and pectorals subequal. 

 Ventrals surpassing anus, their origin separated by 4'/ 2 scales 

 from nth scale of lateral line and opposite to 2nd branched 

 ray of dorsal. Pectorals somewhat shorter than head. Caudal 

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

 height of caudal peduncle i ! / 2 times in length of head and 

 equal to its own length, surrounded by 16 scales. Colour of 

 preserved specimens brownish, darker above. A large black 

 blotch nearly encircling the end of the caudal peduncle. Lower 

 half of dorsal more or less blackish. Length 175 mm. 



No men indig. : Ikan mas (Djambi). 



Habitat: Sumatra (Djambi!); Borneo (river Kapuas, river 

 Sambas, river Baram ?). 



12. Osteochilus brevicauda n. sp. 



D. 3.1617; A. 3.5; P. 1.1314; V. 1.8; L. 1. 3334; 



66^ 



L. tr. ~T~. 

 71 



Height 2.3 2.8, 3 4 in length with caudal. Head 3.5 4.3, 

 5 5.4 in length with caudal. Eye 3 to more than 4, more 

 than once to 1.8 in snout and more than twice in the flat 

 interorbital space. Snout without pores. Maxillary barbels longer 

 than eye, the rostral ones shorter. Origin of dorsal opposite 

 to 8 th scale of lateral line, separated by 10 scales from occiput. 

 Anterior rays of dorsal slightly prolonged, conspicuously longer 

 than head. Origin of anal opposite to 23 rd or 24th scale of 

 lateral line and behind end of dorsal or opposite to ultimate 

 or penultimate branched ray. Ventrals slightly shorter than 

 pectorals, not reaching anus in adult specimens, their origin 

 separated by 5 or 5 ! / 2 scales from nth O r I2th scale of lateral 

 line and opposite to 4th branched ray of dorsal. Pectorals 

 slightly shorter than head. Caudal deeply bifurcate, much longer 

 than head. Least height of caudal peduncle I ! / 2 times or more 

 in length of head, more than length of caudal peduncle, sur- 

 rounded by 1 6 scales, A large round black blotch somewhat 

 before the end of the lateral line. Base of scales with a dark 

 brown streak. In young specimens an indication of an incomplete 

 brown vertical band above and below the lateral line, opposite 

 the middle of the length of the pectoral. Length 230 mm. 



