366 
d. Gillopening extending dorsally above the base 
of the pectoral. Caudal deeply emarginate. . . Akysis p. 370. 
II. No adipose fin. Gillopening extending only to the 
basevoh thepectorally en. ieei che men sy eel te stite nel Breitensteinia p. 373. 
1. Acrochordonichthys Bleeker. 
(BLEEKER, Ichth. Arch. Ind. Prodr. I. Siluri, 1858. p. 221). 
Elongate; head depressed, covered with soft, granular skin. 
Belly flat. Body with longitudinal rows of tubercles. Eyes small, 
looking upward, covered by the skin. Anterior nostrils tubular, 
at some distance behind them the posterior nostrils, which have a 
circular rim, the frontborder of which carries a nasal barbel. A 
pair of maxillary barbels, originating with a broad base, on the 
upper lip. The slender mandibulary barbels far behind angle 
of mouth, the mental ones behind lower lip. Gape of mouth 
rather wide and slightly curved. Snout prominent, rounded. 
A median longitudinal fontanel on the top of the head, visible 
when the skin is removed. Short dorsal fin midway between 
pectorals and ventrals, with 5 soft rays and a pungent spine, 
which is covered by thick skin, and the hindborder of which 
is slightly denticulated in its middle. Adipose fin low, opposite 
to short anal. Ventrals with 6 rays, horizontal, as also the 
pectorals, which have a strong pungent spine, covered by 
thick skin and strongly denticulated behind. Caudal truncate 
or slightly emarginate. Villiform teeth in the jaws, none on 
the palate. Gillopening extending dorsally only to the base 
of the pectoral. Gillmembranes united with each other and 
with the isthmus, there may be a small ridge-like free fold 
across the isthmus. Branchiostegals 6. 
Key: to, the species: 
1. Occipital process, elongate wovals t..icieiel emetcirie tr A, ischnosoma p. 367. 
2. Occipital process triangular. 
a. occipital process more than twice as long as broad 
at its base, rather narrow and pointed....... A, rugosus p. 368. 
6. occipital process 11/, times longer than broad at 
its) base, bluntly spoimted iin 11-0 memeon fnent A, pleurostigma p. 368. 
3, Occipital process quadratic .....eseesessoms A. melanogaster p. 369. 
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