329 
anterior third of it'), 4 times in the convex interorbital space. 
Dorsal fin much higher than the body, its height about 3 times 
its base, some of the rays are prolonged in filaments, its strong 
spine is equal to the head or a little shorter, it is serrated at the 
front and hindborder. The base of the adipose fin is shorter than 
the dorsal, its length being less than '/, its distance from the 
dorsal. Anal emarginate, longer than high and about twice the 
length of the adipose fin. Pectorals 1'/, in the length of the 
head, their spine */, of that of the dorsal, serrated at both 
borders but stronger at the posterior border. Ventrals shorter 
than pectorals. Caudal forked, its upper lobe the longer. 
Teeth small, pointed, in several rows on the jaws, they form 
a slightly curved band in the maxillary, which is 4 times 
broader than long. Length about 150 mm. [After Vinciguerra, 
not seen by us). 
Nomen indig.: Ikan Attit. 
Habitat: Borneo (Sarawak). 
6. Osteogeneiosus Bleeker. 
(BLEEKER, Nat. & Geneesk. Arch. Ned. Ind. III (2). 1846, p. 173). 
Elongate, head strongly depressed, covered by smooth skin. 
Upper jaw projecting before the arcuate mouth, with thin lips. 
Nostrils close together, the posterior with a valve, situated 
superiorly near the frontborder of the snout. Eyes lateral, 
with a free orbital margin. Only one pair of barbels, belonging 
to the maxillaries and very stiff and bony. Short dorsal with 
7 rays and a pungent spine, situated between pectorals and 
ventrals. Adipose fin short, opposite to short anal. Pectorals 
with a pungent spine. Ventrals 6-rayed. Caudal forked, with 
rounded lobes. Villiform bands of teeth in the jaws, on the 
palate two separate patches of obtusely conical teeth. Gill- 
membranes united, their free hindborder deeply emarginate, 
only anteriorly connected with the isthmus. Branchiostegals 5. 
1. Osteogeneiosus militaris (L.). 
Silurus militaris Linné, Systema Naturae, edit. X. 1758, p. 305. 
Arius militaris Cuvier & Valenciennes, Hist. Nat. Poissons, XV. 1840, p. 114. 
Osteogeneiosus macrocephalus Bleeker, Nat. & Geneesk. Arch. Ned. Ind. III (2). 
1846, p. 173. 
1) “Situati nel terzo anteriore del muso”’ (?!). 
q 
