ah, 
2. Ketengus Bleeker. 
(BLEEKER, Verh. Bat. Gen. XXI. I. 1847, Nieuwe bijdr. Silur. p. 9). 
Elongate, head large, very broad, with a _ short, obtuse, 
prominent snout. Headshields naked. Eyes in the anterior 
half of the head, with a free orbital margin. Nostrils very close 
together, the small anterior one with a circular rim, separated 
by a large valve from the larger posterior one. Mouth opening 
wide, arcuate, reaching behind eye. 6 small barbels, a maxillary 
one before the angle of the mouth, a pair of mandibulary 
and mental ones in an arcuate line on the chin. Short dorsal 
with a pungent, denticulated spine and 7 rays. Adipose fin 
short, opposite to anal. Ventrals 6-rayed, reaching anal, their 
origin far behind the end of the base of the dorsal. Pectorals 
with a pungent, denticulated spine. Caudal forked. A single 
series of closely-set, small, incisor-like teeth, obtusely tricuspid 
or subtruncated. Palate edentulous. Gill-membranes confluent 
and broadly united with the isthmus, having a free posterior 
margin without notch. Branchiostegal rays 5. 
Fig. 138. Ketengus typus Blkr. X 2/3. 
1. Ketengus typus Blkr. 
Ketengus typus Bleeker, Verh. Bat. Gen. XXI. I. 1847, Nieuwe bijdr,. Silur. p. 9. 
Pimelodus pectinidens Cantor, Journ. Asiat. Soc. Bengal, XVIII. 1850, p. 1243. 
Cetengus typus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 242. — 
Atl. Ichth. II. 1862, p. 44. 
Ketengus typus Giinther, Cat. Brit. Mus. V. 1864, p. 177. 
Ketengus typus Day, Fishes of India 4°. 1878—1888, p. 468. 
B. is Pee: Tas A. 19—20; Roo 7—8 ; Wie G3 
Height 4'/,—5; head 4'/,—4'/,, slightly longer than broad. 
Headshields granular. Occipital process triangular, longer than 
