368 

 2. Acrochordonichthys rugosus (Blkr.). 



Pimelodus rugosus Bleeker, Verb. Bat. Gen. XXI. I. 1847, Nieuwe bijdr. Siluri, p. n. 

 Acrochordonichthys platycephalus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, 



p. 224. All. Ichth. II. 1862, p. 67. 

 Acrochordonichthys rugosus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, 



p. 227. All. Ichth. II. 1862, p. 68. 



Acrochordonichthys platycephalus Gunther, Cat. Brit. Mus. V. 1864, p. 94. 

 Acrochordonichthys rugosus Gunther, Cat. Brit. Mus. V. 1864, p. 95. 



B. 6; D. I. 5; A. 910; P. I. 7 ; V. 6. 



Height 6 l / 4 7 in total length, greatest width 4^ 4 3 / 4 . 

 Head 4 3 / 4 to sligthly more than 5. Dorsal profile from dorsal 

 to the blunt rounded snout sloping down in a nearly straight 

 line. Nasal barbels slightly longer than eye, maxillary barbels 

 reaching to gillopening or not so far, mandibulary barbels to 

 base of pectorals and mental barbels much shorter. Occipital 

 process rather narrow, triangular, somewhat more than twice 

 as long as broad at its base; an oval hollow at its base, 

 distinctly separated from the median fontanel. Laterally on 

 each side from this hollow a deep groove. Origin of dorsal 

 above the middle of the pectorals, its height equal to post- 

 orbital part of head, its spine somewhat shorter. Anal nearly 

 of equal height, opposite to posterior part of low adipose fin. 

 Ventrals rounded, not reaching anal, about equal to postorbital 

 part of head. Pectorals slightly shorter than head, their spine 

 equal to head from anterior nostril, much longer than the 

 dorsal one. Caudal slightly emarginate, as long as head from 

 posterior nostril. Least height of caudal peduncle more than 

 thrice in its length. Entirely brownish or blackish, with irre- 

 gular light spots. Dorsal, anal, ventrals and pectorals with a 

 whitish margin. In A. platycephalus 3 round distant yellow 

 spots, posteriorly on the sides. Length no mm. [Specimens 

 of A. rugosus of Bleeker's collection in Leyden Museum 

 examined]. 



Nomen indig. : Djogo-ripo (Javan.).' 



Habitat: Java (Buitenzorg !, Surakarta); Sumatra (Palem- 

 bang). 



In rivers. 



3. Acrochordonichthys pleurostigma (Blkr.) [Fig. 149, p. 367]. 



Pimelodus pleurostigma Bleeker, Nat. Tijdschr. Ned. Indie, VII. 1854, p. 442. 

 Pimelodus xonatus Bleeker, Nat. Tijdschr. Ned. Indie, VII. 1854, p. 444. 



