241 
straight. Eye 5—6, 2'/, to nearly 3 in snout. Interorbital region 
rather convex, 2 times diameter of eye. Lips with lamellated 
papillae. Nasal barbels reaching about to the middle of eye, 
maxillary barbels a little farther, mandibulary barbels by far 
the longest, reaching to the vertical through base of pectorals 
or nearly so. Mental barbels extending nearly to the gill- 
opening. First dorsal about 1'/, in the length of the head. 
Origin of first dorsal nearer to origin of ventrals than to 
pectorals. Dorsal spine slender, about .as long as head with- 
out its postorbital part. Highest part of anal equalling the 
length of head without snout. The caudal is longer and united 
with the caudodorsal, the rays of which soon disappear above 
the hindmost '/, of the anal in a pad of fat extending for a short 
distance on the median line of the back. Ventrals rounded, 
extending on the anal, a little longer than postorbital part of 
the head. Pectorals equalling first dorsal, their spine as long as 
or a little longer than that of dorsal, strongly serrated behind. 
Each group of intermaxillary teeth in a quadrangular patch, 
nearly two times as broad as long, the mandibulary patches 
more or less rhombic, about 1'/, times as wide as long. Vome- 
rine teeth in a broad patch, rounded anteriorly and rectilinear 
behind. All teeth brown. First branchial arch with 20—21 
gillrakers (28—-29 on the whole arch), shorter than filaments, 
about '/, length of eye; its innerside with a short membrane 
with rounded papillae on its free edge, which are partly inde- 
pendent. Uniform dark brown, underside of head, innerside of 
upperlip, underlip and its barbels, paired fins and belly whitish. 
Length about 350 mm. 
Habitat: Aru-islands!; South New Guinea (Inawi, on the 
St. Joseph- or Paumomu-river!, Lorentz-river!). — Queensland? 
5. Copidoglanis brevidorsalis Gthr. 
Copidoglanis brevidorsalis Giinther, Ann. Mag. Nat. Hist. 1867, p. 22. 
Neosilurus brevidorsalis Steindachner, Sitzber. K. Akad. Wien, LVI. 1867, p. 319. 
Neosilurus brevidorsalis Max Weber, Abh. Senckenb, Naturf. Ges. XXXIV. 
FORT.) pi, Sr. 
Be in We tee Caucdedorsal + C. + A. circa. 130;_ A. 
Eitea atsok. Fs TOesiV... 12. 
Height 5'/,—6'/,, about equal to head. Dorsal profile sloping 
down in a right line from dorsal to snout, profile behind 
INDO-AUSTRALIAN FISHES II. (6 
