317 

 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. Kranchiostegal.rays 5. 



.>--- . 



Fig. 1 38. Ketengus typus Blkr. X %2 /3- 



i. 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. 

 Ketengus typus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 242. - 



All. 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. 5; D. i. 7;- A. 1920; P. i. 78; V. 6. 

 Height 4*/ 2 5 ; head 4 ! / 4 4 ! /2 slightly longer than broad. 

 Headshields granular. Occipital process triangular, longer than 



