234 



9 1 1 ; 3 ! /2 4'/2 m snout; eyedistance i ! / 2 1 3 / 4 in snout. Nasal 

 barbels reach the eye or nearly so ; about as long as maxil- 

 lary barbels. Mandibulary barbels the longest, they may reach to 

 branchial opening. Mental barbels shorter. Height of first dorsal 

 more or less than half of head, its spine about */ 3 shorter. Second 

 dorsal and anal similar, lower than first dorsal. Ventrals rounded, 

 about as long as height of first dorsal, about J / 3 shorter than 

 pectorals, which are considerably longer than height of first 

 dorsal, their spine shorter than that of the dorsal. Lower 

 surface of head and abdomen white, uppersurface of head 

 and anterior part of back dark brown, otherwise marmorated 

 dark brown and yellowish, like the fins; but underside of 

 ventrals and pectorals more or less uniform white. Barbels and 

 lips white. Length more than 200 mm. 



Habitat: South New Guinea. (Lorentz river!). 



5. Porochilus M. Weber. 



(MAX WEBER. Nova-Guinea IX, livr. IV. 1913, p. 523). 



Elongate, tapering, head more or less depressed, mouth 

 transverse, rounded in front. Eyes covered with skin, lips 

 rather thin, weakly papillated, the thicker underlip lamellated. 

 Upperlip slightly prominent. Its interior border perforated by 

 the anterior nostrils, which look downwards. Posterior nostril 

 a slit behind the nasal barbel. A maxillary barbel at the end 

 of the upperlip, a mandibulary near the corner of the mouth 

 and two mentals between the mandibulary barbels. Origin of 

 first dorsal conspicuously behind origin of pectorals, a little 

 before ventrals, with a rather weak spine, without serrature. 

 Caudodorsal very short, its anterior rays above the last 1 J 5 of 

 the anal, nearly no procurrent fat pad. Anal many-rayed, 

 confluent with the caudal. Ventrals with n 12 rays. Pecto- 

 rals with 7 8 rays and a rather weak spine, which has a few 

 teeth at its frontborder. Conical teeth in 2 3 rows forming 

 two small subtriangular patches in the upper jaw. The man- 

 dibulary ones are also conical, crowded in two laterally 

 narrowing and rounded patches, mesially in about 7 rows, 

 the anterior ones a little recurved. Vomerine teeth cylindrical, 

 rather high, with a rounded top, in a patch, rounded anteriorly. 

 The majority of the teeth is light brown or tipped with yel- 

 lowish. Lateral line more or less conspicuous by distant pores. 



