370 
barbels scarcely reaching opercles. Occipital process slightly 
longer than broad at its base, its top truncate or emarginate, 
its sides parallel. Median fontanel reaching to base of occipital 
process. Height of dorsal less than twice its length, about 
equal to height of body, its spine of about the same height and 
1?/,—17/, in length of head. Height of anal less than height 
of body, slightly more than its length, more than twice shorter 
than adipose fin. Ventrals obtuse, about twice shorter than 
pectorals. Pectorals acute, slightly shorter than head, their 
strong spine curved, longer than the dorsal one, in the middle 
of its length provided with some teeth. Caudal truncate with 
acute angles, 67/, in length. Yellowish brown above, dark brown 
below, fins yellowish brown, densely reticulated. Length of 
single specimen known 110 mm. [After Bleeker, not seen by us]. 
Habitat: Sumatra (Palembang). 
Doubtful species. 
Acrochordonichthys pachyderma Vaillant, Notes Leyden Mus. XXIV. n° I—3, 
1902, p. 66. Borneo (river Bluu). 
Sosia chamaleon Vaillant, Notes Leyden Mus. XXIV. n°. 1—3, 1902, p. 82, 
Borneo (river Kapuas, river Mandai, river Sibau). 
Acrochordonichthys obscurus Popta, Notes Leyden Mus. XXIV. n° 4, 1904, 
p. 187. — Notes Leyden Mus. XXVII. 1906, p. 55. Nomen indig.: Putero, 
Borneo (river Bongan). 
Acrochordonichthys biittikoferi Popta, Notes Leyden Mus. XXIV. n°. 4, 1904, 
p- 188. — Notes Leyden Mus. XXVII. 1906, p. 58, Borneo (rivers Bongan 
and Bo). 
Acrochordonichthys varius Popta, Notes Leyden Mus. XXIV. n°. 4, 1904, p. 189. — 
Notes Leyden Mus. XXVII. 1906, p. 63, Borneo (river Bo). 
We believe that the above named species, examined by us 
in the Leyden Museum, belong to A. melanogaster or are only 
local or colour-varieties, though their median fontanel is far 
distant from the base of the occipital process, at the base of 
which lies a separate small hollow. It may be that Bleeker 
has overlooked the fact that these fontanels are separated. 
2. Ak ysis) Bleeker ar 
=P 2 
(BLEEKER, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, P: 234). 
Head broad, depressed, covered by soft skin, body tapering 
behind. Skin covered with roundish granules. Belly flattish. 
Eyes small, looking upward, covered by skin. Anterior nostril 
— 
