3o8 

 I. Chilatherina fasciata (M. Web.). 



Rhovibatractus fasciatns Max Webev, Nova Guinea IX. Livr. 4, 191 3, p. 565. 

 Chilathei-ina fasciata Tate Regan, Trans. Zool. Soc. London XX. Part 6, 191 4, 

 p. 282. 



DM. 4— 5; D-. I. 13— 16; A. I. 23— 25(26); P. I. 14-15; 

 V. 1.5; L.l. 40 — 42; L.tr. 12 — 13. 



Dorsal profile somewhat convex behind nape; ventral profile 

 strongly convex. Head pointed. Height 3 — 5.3,6 — 6.3 in length 

 with caudal. Head 4.3 — 5.8, 5.2 — 7.2 in length with caudal. 

 Eye 3 — 3.2, somewhat less than interorbital space, which is 

 about equal to snout. Upper jaw prominent. Mouthopening 

 reaching behind middle of length of snout, but not to front- 

 border of eye. Maxillary not visible when the mouth is closed. 

 Upper lip thickened. Jaws with several series of strong pointed 

 teeth anteriorly, diminishing in number posteriorly, forming a 

 single series on the lateral part of the intermaxillaries and 

 extending outside the mouth on the upper lip and less so on 

 the lower lip. The intermaxillaries are gently curved, not 

 abruptly bent from a horizontal into a lateral oblique part. 

 Small teeth on vomer and on base of tongue. None on pala- 

 tines. Two, and posteriorly three rows of scales on subocular part 

 of cheeks. Large scales on operculum, smaller ones on its supe- 

 rior part. First dorsal separated by 19 — 21 scales from occiput. 

 Spine of first dorsal longer than postorbital part of head, longer 

 than that of second dorsal, which is more curved and much 

 longer than that of anal, which is about as long as eye. Length 

 of base of anal considerably longer than distance between 

 origin of first dorsal and end of second dorsal. Origin of anal 

 beginning 2 — 4 scales before that of first dorsal. Pectorals curved, 

 equal to or longer than head without snout. Scales smooth 

 or indistinctly crenulated at their hindborder. Caudal peduncle 

 much longer than high. Colour of alcohol specimens brownish 

 above, lighter below, with a more or less distinct longitudinal 

 black band and a series of transverse narrow bands, forming 

 about right angles with the longitudinal band in the lower half 

 of the body. These bands are sometimes obsolete. Fins dusky. 

 Length 131 mm. 



Habitat: Northern New Guinea (Mamberamo! and Iden- 

 bucg river!, river Sermowai and its tributaries!, river near 

 Njao!, tributary of Kaiserin Augusta river!). 



Fresh water. 



