124 



4- Tylosurus leiurus (Blkr.) 



Belone leiurus Bleeker. Nat. Tijdschr. Ned. Indie I 1850, p. 94; Veihand. Bat. 



Genootsch. XXIV. 1852, Snoekachtige Visschen, p. 13. 

 Mastacembelits anaslciiiclla Bleeker, Ned. Tijdschr. Dierk. III. 1866, p. 224 



(nee C.V.). 

 Bcloiic leiurus Kner, Fische Novara Exp. 1865 — 1867, p. 321. 

 Belo/ie liurus Giinther, Cat. Brit. Mus. VF. 1866, p. 250. 

 Mastaccmbclus leiurus Bleeker, Atl. ichth. VI, 1866 — 1872, p. 46. 

 Belone liura Day, Fishes of India 4°, 1S78 — 1888, p. 511. 

 Tylosurus leiurus Jordan & Richardson, Bull. Bureau Fish. Washington XXVII. 



1908, p. 243. 

 StroTigylura leiura Fowler, Proc. Acad. Nat. Sc. Philadelphia I,XXI. 1 919, p. 5. 



D. 2.16— 18 or 1. 17; A. 2.21 — 23; P. 1. 10— II; V. 1.5; 

 L. 1. 185—200. 



Compressed, the breadth of the body going 1.3 — 1.5 in its 

 height. Caudal peduncle rather variable, sometimes as high 

 as broad, but generally higher than broad. Height 17 — 26, 

 18 — 29 in length with caudal. Head 2.8 — 3.2, 3^ — 3.4 in length 

 with caudal. Eye 2.5 — 3.3 in postorbital part of head, i.i — 1.3 

 in interorbital space and 8 to more than 9 in snout. Upper 

 surface of head flat, with a broad but shallow scaly median 

 groove, which widens anteriorly and through which runs a 

 low, rounded, longitudinal ridge, which disappears anteriorly. 

 Parietals coarsely striated, frontals with some striae, which 

 disappear anteriorly, the supraorbital region being almost smooth. 

 Upper surface of beak with fine striae. Height of mandible 

 below pupil equal to or a little more than diameter of eye. 

 Two thirds of maxillary hidden by praeorbital. Operculum 

 scaly. Canines slender, somewhat curved backwards. Tongue 

 smooth. Pectorals a little longer than or equal to postorbital 

 part of head. Base of ventrals midway between base of caudal 

 and hindborder of eye or somewhat nearer to firstnamed. The 

 middle and hinder dorsal rays subequal in length and much 

 shorter than the anterior ones. Origin of dorsal far behind 

 that of anal, situated above the 7th divided ray of lastnamed 

 fin and separated by 11 or 12 scales from lateral line. Caudal 

 fin subtruncate. Colour in alcohol brownish, with a silvery 

 lateral band, bordered above by a dark line, which is more 

 clearly visible in formol specimens. Pectorals with a black 

 subterminal blotch. Dorsal and — less so — anal with a blackish 

 border. Ventrals hyaline. Caudal dusky. Length 580 mm. 

 [Many specimens of Bleeker's collection seen by us]. 



