365 
between the occipital process and the basal shield of the 
dorsal spine; head longer than broad, a little broader than 
deep; snout not prominent. The depth of the body contained 
five times in the total length (without caudal), the length of 
the head thrice and two thirds. Barbels slender and short, 
the maxillary reaching the opercle. Dorsal spine serrated be- 
hind, its length two thirds that of the head. Adipose fin 
twice as long as dorsal, as long as its distance from the 
latter. Pectoral spine strong, considerably longer than the 
dorsal, strongly serrated on the inner edge. Brown above, 
fins blackish brown. Length 90 mm. [After Boulenger, not 
seen by us]. 
Habitat: Sumatra (Deli). 
7. Fam. AKYSIDAE. 
More or less elongate, belly flat, skin covered with roundish 
granules or tubercles, which may be arranged in longitudinal 
rows. Head depressed, with or without prominent longitudinal 
ridges, covered by soft skin. A median longitudinal fontanel 
present. Anterior nostrils tubular, at some distance from the 
posterior ones, which have a circular rim, the frontborder of 
which carries a nasal barbel. A pair of maxillary, mandibulary 
and mental barbels. Snout slightly prominent before the trans- 
verse or curved mouthopening. Short dorsal with five soft 
rays and one or two pungent spines, covered by skin, placed 
anteriorly, between pectorals and ventrals. Adipose fin absent or 
present, in latter case opposite to short anal. Ventrals 6-rayed, 
horizontal, as also the pectorals, which have a strong osseous 
spine. Caudal truncate or deeply emarginate. Villiform teeth 
in the jaws, none on the palate. Gillmembranes united with 
each other and with the isthmus. Gillopening narrow, extending 
dorsally to the base of the pectoral or above it. Branchiostegals 6. 
ew. to, the genera. 
I, Adipose fin present. 
a. Gillopening extending dorsally only to the base 
of the pectoral. Caudal truncate or slightly 
GERRI ES). co) ovata tay 's “s/o ete te Ae We ite fay Acrochordonichthys p. 366. 
i —_———e 
