216 



sing middle of anal, 8 9 radiibran- 



chiostegi C. lais p. 2 1 8. 



y. Maxillary barbel extends to base of 



pectorals, 10 II radii branchiostegi. . C. cryptopterus p. 218. 

 2. Mandibulary barbel longer than head. Anal 

 70 or more. 



a. Maxillary barbel extends to posterior quarter 



of anal, dorsal profile convex, head 6'/2 C. limpok 219. 



b. Maxillary barbel extends to second fourth 



of anal, dorsal profile nearly straight . . . C. mononema p. 220. 

 B. Dorsal absent. 



a. Vomerine band angular. Pectorals much 



shorter than head; head 4 3 / 3 5^3 C. apogon p. 220. 



b. Vomerine band rounded, nearly as broad 

 as palate. Pectorals shorter than head, 



head 5 2 /3 C. microncnia p. 221. 



c. Vomerine band straight, short, elliptic. Pec- 

 torals longer than head, head 6 1 / 2 7 J /5' . C. hexapterus p. 222. 



I. Cryptopterus schilbeides (Blkr.). 



Hemisilurus schilbeides Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 297. 



All. Ichth. II. 1862, p. 94. 

 Cryptopterus schilbeides Giinther, Cat. Brit. Mus. V. 1864, p. 41. 



B. 9 IO; D. O; A. 65 71; P. I. 12; V. 5. 



Elongate. Dorsal profile convex, sloping down with a con- 

 cavity to the snout. Height 4'/ 2 5> head 6'/ 2 7> eye 2 ! / 2 3> 

 nearly equal to snout, situated behind corner of mouth, its 

 lower half below the level of the cleft of the mouth, nearly 

 i ! / 2 times in the convexity of the interorbital space. Upper 

 jaw slightly prominent. Maxillary barbel reaching about to 

 origin of anal, mandibulary ones rudimentary or missing. Anal 

 free from caudal. Ventrals equal to half eye. Pectorals a little 

 longer than head, the osseous part of their spine equal to 

 snout and eye. Teeth in the upperjaw in a slightly curved 

 narrow band, the band in the lower jaw more curved. The 

 few vomerine teeth in two widely separated small patches. 

 Gillrakers 17. Yellowish, with a few black dots on the top 

 of the snout, along the back and on the anal. Length 120 mm. 



Nomen in dig. : Lais paddi (Djambi). 



Habitat: Sumatra (Palembang, Djambi!); Borneo (Banjer- 

 massin, Sarawak (Brit. Mus.)). 



In rivers. 



