218 
with a slight concavity in the nape of the neck to the snout. 
Height 3'/,—4'/,, head 57/,—6'/,, eye about 2'/,—3, situated 
behind the cleft of the mouth, nearer to the lower profile of 
the head, longer than snout, 1'/, times in the strong con- 
vexity of the interorbital space. Maxillary barbels reaching to 
ventrals or to anal, those of the mandibles — if present — 
rudimentary and far behind symphysis. Dorsal a little before 
origin of ventrals. Anal free from caudal. Ventrals nearly as 
long as the eye. Pectorals much longer than head, the osseous 
part of their spine somewhat shorter than head. Caudal deeply 
incised. Teeth in the jaws in a narrow crescentic band, those 
on the vomer in a more or Jess oval patch. Gillrakers 15. 
Colour yellowish, dorsal surface of head and back, pectorals, 
distal part of anal and hindborder of caudal blackish. A violet 
spot above the pectorals. Length 170 mm. 
Nomen indig.: Limpok (Mal. Batav.), Padgiat, Mahor 
(Serawak). 
Habitat: Java (Batavia, Gempol); Sumatra (Padang, Palem- 
bang, Lahat, Djambi!); Borneo (rivers Kapuas, Barito, Maha- 
kam!, Sambas, Baram, Serawak). — Siam. 
The locality “Amboina”’ for C. amboinensis Gthr. is cer- 
tainly erroneous. 
In fresh water. 
4. Cryptopterus lais (Blkr.). 
Stlurus fais Bleeker, Nat. Tijdschr. Ned. Indié II. 1851, p. 428. 
Kryptopterichthys lais Bleeker, Ichth, Arch. Ind. Prodr, I. Siluri, 1858, p. 291. — 
Atl. Ichth. II. 1862, p. 88. 
Cryptopterus fais Giinther, Cat. Brit. Mus. V. 1864, p. 42. 
Cryptopterus lais yon Martens, Exp. nach Ost-Asien, Zool. Bd. I. 1876, p. 399. 
Differs from the preceding species, according to Bleeker 
and Giinther, by its longer maxillary barbel, reaching to or 
surpassing the middle of the anal, by the more concave 
profile of its neck and by the stronger convexity of its back. 
Perhaps it-belongs to C. dzcerrhis.. Wength, 125 mm |iape 
in the Leyden Museum, in very bad state, examined]. 
Habitat: Borneo (rivers Sambas, Barito, Kahajan, Danau 
Sriang). 
5. Cryptopterus cryptopterus (Blkr.). 
Silurus cryptopterus Bleeker, Nat. Tijdschr. Ned. Indié I. 1851, p. 270. 
Kryptopterus micropus Bleeker, Ichth. Arch. Ind, Prodr. I. Siluri, 1858, p. 284. 
Atl, Ichth, II. 1862, p. 86, 
