300 
brown, ventral surface white, as also the upperlip; maxillary 
barbels bluish black, mandibulary barbels superiorly of same 
colour, inferiorly white as also the mental ones. Fins reddish, their 
border blackish, especially that of the caudal. Lenght 270 mm. 
Habitat: South New Guinea (Lorentz river!).— North and 
North East Australia. 
In rivers and estuaries. 
18. Arius danielsi T. Regan. 
Arius (Hemiarius) Danielsi Tate Regan, Ann. Mag. Nat. Hist. (8), I. 1908, p. 154. 
Arius Danielsi Max Weber, Nova Guinea IX, livr. 4. 1913, p. 542. 
Bia6: -D. a. 7s FA 2320 ae gO har O: 
Elongate; height 4°/, to nearly 5'/,, head 3'/;—3'/,, its 
width 1'/,—11/, in its length. Dorsal profile sloping down from 
dorsal nearly in a straight line to the 
flat, rounded snout which projects so far 
before the lower jaw, that the maxillary 
teeth remain uncovered. Lips thin, forming 
a fold at the corner ofthe rounded mouth, 
which goes nearly twice in the head. Eye 
5*/;—-8'/,, 2—3 in snout, situated laterally 
behind and partly above the fold of the 
Fig. 124. Arius danielsi Regan. X 5g. 
corner of the mouth, more than 4 times in the convexity of the 
interorbital space. Free orbital margin wanting above. Posterior 
surface of head granulated, occipital process with median keel, 
1'/, times as long as broad, extending to the crescentic basal 
