I30 



Moderately compressed, the breadth of the body going i'/4 

 in the height. Caudal peduncle only a little higher than broad. 

 Height almost 12, 13 in length with caudal. Head 2.8, 3.2 in 

 length with caudal. Eye 2.6 — 2.8 in postorbital part of head, 

 1.5 in interorbital space and almost 7.3 in snout. Mandible 

 strong, its height below pupil about equal to vertical diameter 

 of eye. Upper surface of head with a deep broad median 

 groove, tapering anteriorly and prolonged into a narrow median 

 groove on the beak. Superciliary region with numerous fine 

 striae. Maxillary entirely hidden by praeorbital. Operculum 

 not scaly. Canines moderately developed, subulate, straight. 

 Tongue smooth. Pectorals somewhat longer than postorbital 

 part of head. Ventrals as long as pectorals. Base of ventrals 

 midway between base of caudal and centre of eye. Middle 

 and hinder dorsal and anal rays shorter than anterior ones, 

 which are prolonged. First anal rays much longer than those 

 of dorsal. Origin of dorsal above second simple ray of anal; 

 18 scales between origin of dorsal and lateral line. On the 

 caudal peduncle the lateral line forms a distinct keel, which 

 is not coloured black. Caudal forked, the lobes pointed. Colour 

 when fresh: "belly white or light bluish grey, back dark, 

 with green reflection. Sides with orange spots" (Dr. Rutten). 

 Fins dusky. Length 575 mm. 



Habitat: Borneo (Balikpapan !); Celebes (Menado). 



3. Athlennes Jordan & Fordice. 



(Jordan & Fordice, Proc. U. S. Nat. Mus. 1886, p. 342). 



Very elongate. Body extremely compressed, almost ribbon- 

 shaped. Intermaxillaries and mandibles prolonged, forming a 

 slender beak; the intermaxillaries slightly constricted towards 



Fig. 49. Athlennes hians (C. V.) X 'A- 



their base where they are strengthened by a conical swelling of 

 the bone, with the point directed forwards. Both jaws with a 



