260 
their spine of equal length, flattened, its hindborder serrated. 
Villiform teeth in the jaws in curved bands, on the vomer 
in 2 quadrangular patches, separated from the oblong palatine 
patches. Silvery; upper surface of head and back blackish, as also 
a band beginning at the opercle and running along the anterior 
third of the lateral line, rapidly diminishing in size, some- 
times continued as a narrow line to the base of caudal. Fins 
yellowish, hindborder of caudal dark. Length about 180 mm. 
Nomen indig.: Rios. 
Habitat: Java‘, Borneo (Banjermassin!). 
In rivers. 
6. Pangasius de Zwaani M. Web. & de Bfrt. [Fig. 103, p. 255]. 
Pangasius de Zwaani Max Weber & de Beaufort, in Maass, Durch Zentral- 
Sumatra II. 1912, Fische p. 14. 
BSG; DIM 7 re 4b ea e oT Ne 
Elongate, compressed, dorsal profile straight behind dorsal, 
before dorsal sloping down in a straight line to the broad, 
slightly prominent snout. Mouthopening subterminal, some- 
what oblique, curved, distance of corners of mouth slightly 
more than twice in length of head. Height nearly 5, head 6, 
covered by smooth skin. Eye slightly more than 4, shorter 
than snout, situated behind corner of mouth, its lower half 
below the horizontal through that corner, totally below the 
horizontal through the extremity of the mouth, more than 
thrice in the convexity of the interorbital space, more than 
twice distant from each other ventrally. Maxillary barbels, 
originating in a groove beginning behind corner of mouth and 
hidden in its continuation nearly to the hindborder of the 
eye, slightly longer than eye, the still weaker mandibulary 
barbels °/, of eye. Dorsal equal to head, osseous part of 
its spine somewhat shorter, its hindborder serrated. Adipose 
fin shorter than eye, below posterior '/, of anal, which goes 
3'/; in length. Ventrals extending on anal, nearly as long as 
head without snout. Pectorals equal to head, their spine. 
slightly shorter, with the hindborder denticulated. Villiform 
teeth in rather narrow bands in the jaws, that of the upper 
jaw slightly, that of the lower jaw strongly curved. Vomerine 
and palatine teeth in 4 approximated patches, arranged in a 
flat curve. Whitish, head, anterior part of body and back 
