280 
much less than that of the soft dorsal and about 4'/, times 
in its distance from that fin. Ventrals do not reach anal and 
are much shorter than pectorals, the length of which is about 
equal to head without snout, its flattened spine somewhat 
shorter and stronger than that of the dorsal. 7—8 stout, short 
gillrakers. Villiform teeth in an arcuate band in the jaws, 
granular teeth far back on the palate in 2 oval patches, the 
long axes of which converge hindward. Two small patches 
in front on the palate, reduced to a few small teeth or even 
wanting. Brownish above, whitish below. Outer half of fins 
dusky. Length 460 mm. 
Nomen indig.: Ikan manjong (Malay. Batav.). 
Habitat: Java (Batavia); Sumatra (Moara Kompeh, Bagan 
api api!); Borneo (rivers Kapuas and Baram, Balikpapan!, 
Sandakan). 
In sea, estuaries and rivers. 
4. Arius polystaphylodon Blkr. 
Arius polystaphylodon Bleeker, Nat. & Geneesk. Arch. Ned. Ind. III (2). 1846, 
pe 72. 
Ariodes polystaphylodon Bleeker, Ichth. Arch. Ind. Prodr. I, Siluri 1858, p. 90. — 
Atl. Ichth. II. 1862, p. 41. 
Arius polystaphylodon Giinther, Cat. Brit. Mus. V. 1864, p. 166. 
Arius polystaphylodon Max Weber, Siboga-Exp. Fische, 1913, p. 28. 
Ba 65°0D. 1275) Gk. Vee 
Elongate, height 5, head about 3'/,, higher than broad, its 
width 1'/, in its length. Hindpart of head rugous and some- 
what granulate. Occipital process keeled, strongly elevated 
transversally, with rough and strong granulations, oblong; its 
margins irregularly convex in such a way that the hinder ?/, 
of the process forms a more or less triangular shield; the 
truncate hindborder touches the basal bone of the dorsal spine, 
which bone has winglike lateral extremities. The broad median 
fontanel begins near the extremity of the snout, bordered in 
its anterior half by 2 posteriorly divergent narrow bony crests, 
in its posterior half, which is narrowed to a mere slit, it is 
bordered by two broad, rounded crests, convergent to the base 
of the occipital process. Humeral process rather long, triangular, 
pointed and rugous. Dorsal profile sloping slightly down, witha 
convexity above the opercles, to the somewhat pointed, slightly 
prominent snout, the frontborder of which is rounded. Eye 6'/,, 
