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broad at its base, its posterior end emarginated and receiving 
the crescentic, granular basal bone of dorsal spine. The median 
fontanel does not extend to base of occipital process. Eye 
3—4°/,- Maxillary and mandibulary barbels equal to eye, the 
mental ones shorter. Height of dorsal equal to head. Dorsal spine 
serrated on both sides and about of the length of the head. Base 
of adipose fin equal to that of soft dorsal, about thrice in its 
distance from that fin. Height of anal much less than that of 
dorsal. Pectoral spine denticulated at both edges, shorter than 
head. Caudal bifurcate, the upper lobe the longer. Darkish 
above, whitish silvery below, all over with a metallic hue. 
Fins yellowish. Length 240 mm. 
Nomen indig.: Keteng (Madura). 
Habitat: Java (Surabaya); Madura; Sumatra (Palembang); 
Borneo (rivers Barito and Mahakam!). — Pinang, Siam, 
Andamans. 
In rivers and in brackish water near the shore. 
3. Tetranesodon M. Weber. 
(Max WEBER, Nova Guinea IX. livr. 4. 1913, p. 545). 
Head conical, snout conical, strongly prominent before small, 
transverse inferior mouth, the lips of which are internally 
swollen. Nostrils close together, lateral, the posterior with a 
valve. A pair of short maxillary, mandibulary and mental 
barbels. Headshields rugose, covered with thin skin. Occipital 
process touching the basal bone of dorsal spine. Eye of 
medium size, lateral, with free orbital margin. Dorsal with 7 
rays and a pungent spine, originating in the middle between 
pectorals and ventrals. Adipose fin moderate, above anal. 
Ventrals six-rayed. Pectorals with a pungent spine. Caudal 
forked. Axillary pore present. On each side in the jaws a 
narrow patch of conical teeth, few in number. Palate edentulous. 
Gillmembranes united, in their middle connected with the 
isthmus, with a free posterior margin. Ventral branch of first 
branchial arch with few (8) gillrakers. 6 branchiostegal rays. 
I. Tetranesodon conorhynchus M. Web. 
Tetranesodon conorhynchus Max Weber, Nova Guinea IX. livr. 4. 1913, p. 546. 
Bb? 62h Dia: fie aXe Wy § Pra 1Os* VeOs 
Elongate. Height below dorsal spine somewhat more than 6; 
