468 PROCEEDINGS OF THE ACADEMY OF [July, 



ing out as in preceding species, and last ray separate from caudal dis- 

 tally. Caudal small, damaged. Pectoral broad, expanded, rounded, 

 median rays longest, and reaching be^^ond base of dorsal and first anal 

 rays. Pectoral spine pungent, curved, outer margin entire, about f 

 length of fin or reaching opposite posterior basal margin of dorsal at 

 least, and basally covered with a rather broad membrane. A^entral 

 inserted about opposite origin of dorsal, small, rounded, reaching a 

 little beyond tip of depressed pectoral, and also covered with a rather 

 broad basal membrane. Yent close behind ventrals, with a papilla, 

 and anal fin close behind it. 



Color in alcohol brown, rather paler on trunk than on fins which 

 are pale brownish. Several indistinct brown cloudings or blotches on 

 trunk and base of anal. Barbels brownish. Iris slaty. 



Length 3f inches. 



Type No. 13,929, W. I. A. P. Borneo. 189S. Dr. W. H. Furness. 



Only one example, the type described above. It is close to Ompok 

 leiacanthus (Bleeker), but differs in coloration. That of 0. jaynei is 

 blotched and has dark ends to the pectoral fins. Ompok horneensis 

 (Steindachner)^* also differs in the uniform coloration, except the dark 

 spot before the caudal. 



(Named for Prof. Horace Jayne, formerly Director of the Wistar 

 Institute of Anatomy, of Philadelphia, to whom I am principally in- 

 debted for this opportunity of stud3dng the fishes of Borneo.) 



17. Kryptopterus oryptopterus (Bleeker). 



Head of; depth 4f ; D. 2; A. 60; P. I, 14; V. I, 5; width of head 

 If in its length; depth of head, at anterior margin of orbit, 2^-; width 

 of mouth 2; snout 3; eye 3^; interorbital space If; ventral 5; pec- 

 toral 5 in head and trunk. Rakers rather long, slender and numerous. 



18. Kryptopterus limpok (Bleeker). 



Head 6 to 6i; depth 5 to 5^; D. 2; A. 69 to 77; P. I, 14 or 15; V. i, 

 7 or 8; pectoral 1 to 1 j^ in head; ventral 2^ to 2f ; pectoral spine If 

 to If; width of head 1^ to If; snout 2| to 3, from tip of upper jaw; 

 eye 3-^ to 4-^o ', width of mouth 2^ to 2f ; interorbital space 2,^ to 2f . 

 Inner edge of pectoral spine pectinate. About 12 inches long. Four 

 examples from the Baram river, some from upper waters. 



19. Kryptopterus palembangensis (Bleeker). 



Head 5f ; deptn 3i; D. 2; A. 61; P. I, 11; V. i, 5; width of head U 

 in its length; depth of head at posterior margin of orbit about If in 



^^Callichrous (Silurodes) horneensis Steindachner, Abhand. Senck. Nat. Ges- 

 Frankfurt, XXV (2), 1901, p. 445, PL 18, fig. 3. Aus dem Baram-Flusse, Borneo- 

 (Herr Prof. Kiikenthal.) 



