134 



anteriorly and continued as a narrow groove on the beak. 

 About two thirds of maxillary hidden by praeorbital. Canines 

 short, subulate, vertical. Tongue smooth. Operculum not scaly. 

 Depth of mandible below pupil less than half diameter of eye. 

 Pectorals conspicuously shorter than postorbital part of head, 

 ventrals 1.5 — 1.7 in length of pectorals. Base of ventrals about 

 midway between hindmargin of praeoperculum and base of 

 caudal. Origin of dorsal opposite to that of anal '), origin of 

 dorsal separated by about 21 scales from lateral line. Middle 

 and hinder dorsal and anal rays much shorter than the anterior 

 ones. Caudal slightly rounded. Colour brownish, more or less 

 silvery below. A brownish lateral band becoming broader and 

 silvery on the tail. Fins hyaline, caudal dusky. Ventrals 

 sometimes tipped with blackish. Length 275 mm. 



Nom. in dig.: Djulong-djulong (Lampong), Penjolang (Tepu, 

 Borneo). 



Habitat: Sumatra (Telokbetong, Pangabuang, Palembang, 

 Benakat, Lahat, Taluk! Djambi!); Borneo (Pontianak, Putus 

 Sibau !, Raun !, Sebruang, Tepu!). 



In fresh water. 



Species of doubtful occurrence: 

 I. Xenentodon cancila H. B. 



Macleay (Proc. Linn. Soc. New South Wales, VIL 1S83, 

 p. 592) records this species from Port Moresby, New Guinea. 

 As this species has only been found in freshwater of the 

 Asiatic continent and its near relative X. canciloides is only 

 known from Sumatra and Borneo, we agree with Ogilby 

 (Mem. Queensland Mus. V. 1916, p. 128) when he says: "I 

 am inclined to doubt the correctness of the identification of 

 this Indo-Burmese fish so far east". 



It is not improbable that Macleay's specimens belong to 

 Tylosurus krejfti, which species lives in the rivers of New 

 Guinea and has a superficial likeness with X. cancila. 



II. Suborder Exocoetoi'de a. 

 Scales large or moderate. Mouth small, the upper jaw not 



i) GuNTHER States I.e.: "The first dorsal ray is opposite to the third or 

 fourth of the anal fin." This is not the case. Bleeker made this mistake in 

 the first description of the species, but corrected it in his later descriptions. 



