24 1 



straight. Eye 5 6, 2 ! / 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 i'/ 3 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 '/ 4 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 i ! / 2 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 1 J 2 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^.319. 

 Neosilurus brevidorsalis Max Weber, Abh. Senckenb. Naturf. Ges. XXXIV. 



IQII, p. 21. 



B. 9; I. D. I. 4; Caudodorsal -f C. -f- A. circa 130: A. 

 circa 83; P. I. IO; V. 12. 



Height 5 ! / 2 6'/ 2 , about equal to head. Dorsal profile sloping 

 down in a right line from dorsal to snout, profile behind 



INDO- AUSTRALIAN FISHES II. 1 6 



