194. 
of pectorals or farther. Pectorals a little more than once to 1'/, 
only a little shorter than the pectorals, and by their milk 
white colour, a little reddish in the fresh state. 
2. Clarias fuscus Cuvier & Valenciennes, Hist. Nat. Pois- 
sons, XV. 1840. p. 383. (nec Lacépede). (Sumatra). 
This species is too shortly described to make out its dis- 
tinctive specifical characters. 
3. Clarias gagur H. B. mentioned by von Martens, Exp. 
nach Ost-Asien, Zool. Bd. I. 1876. p. 302, 399, from Danau Sriang 
(Borneo), is probably Clarzas nieuhofit, as Claritas jagur H. B. 
has never been recorded since. 
2. Heterobranchus Geoffroy St. Hilaire. 
(Geoffroy St. Hilaire, Descript. Egypte, Poissons 1809. p. 305). 
For characters of the genus sce those of the family. 
Freshwater species, three from Africa and one from the 
Indo-australian Archipelago. 
1. Heterobranchus tapeinopterus Blkr. 
Feterobranchus tapeinopterus Bleeker, Nat. Tijdschr. Ned.-Indié III. 1852. p. 
732. — Atl. Ichth. II. 1862. p. tor. 
Fleterobranchus tapeinopterus Giinther, Cat. Brit. Mus. v. 1864. p. 22. 
; 
Fig. 75. Heterobranchus tapeinopterus Blkr. 
Head from above, dentition of upper jaw and vomer and of lower jaw 
(After Bleeker). 
B..8; Diy 2427, A. AO—5 1 3.be ae, Seno: 
Height 8—g'/,, head measured to the operculum 57/,—6°*/,. 
Eye 15—18. Nasal and mental barbels reaching to base of 
pectorals, maxillary and mandibulary barbels reaching to tip 
of pectorals or farther. Pectorals a little more than once to 1'/, 
