121 



I. Tylosurus strongylurus (v. Hass.). 



Ih'lonc strongylura van Ilasselt, Alg. Konst- en Lettcrbodc, Dcel I, 1823, p. 130. 

 Bclonc caiidimacttla Cuvicr, Rcgne animal, ed. 2a II. 1829, p. 285. 

 Belonc caitt/iinaciila Cuvier & Valenciennes, Hist. nat. Poissons XVIII. 1846, p. 452. 

 Bclonc caitJimaciila Cantor, Journ. Asiat. Soc. of Bengal, XVIll. 1850, p. 1228. 

 Bclone caiidiinacula lileeker, Verb. ISat. Genootsch. XXIV. 1852, Snoekachtige 



Visscben, p. 12. 

 Mastacembclus caudimacula lileeker, Ned. Tijdscbr. Dierk. II. iS65,p. 176, p. 294. 

 Mastiiccmbclus strongylurus Bleeker, Ned. Tijdscbr. Dierk. III. 1866. p. 220. 

 Belone cauJiinaculata Giintber, Cat. Rrit. Mas. VI. 1866, p. 245. 

 Belone strongylurus Giintber, ibid. p. 246. 



Mastacembclus strongylurus Bleeker, Atl. icbth. VI. 1866 — 1872, j). 45. 

 Bclonc strongylura Day, Fisbcs of India 4°, 1878 — 1S88, p. 512. 



U. 1. 10 — 2.13; A. 2.13— 15 ; P. 1.9 — I. TO; V. 1.5; L. 1. circa 170. 



Slightly compressed, the height being only a little more 

 than the breadth of the body. Tail somewhat more compressed. 

 Height 14 — 15, 16—17 '" length with caudal. Head 2.5 — 2.7, 

 2.9 — 3.1 in length with caudal. Eye 2.6 — 4 in postorbital part 

 of head, 7 — 8.3 in snout and about equal to or a little less 

 than interorbital space. Height of mandible below pupil much 

 less than greatest diameter of eye. Upper surface of head 

 Hat with a well developed but rather shallow median groove. 

 Supraorbital region with some striae. Maxillary only half hidden 

 by praeorbital. Operculum scaly. Canines rather small, slightly 

 directed backwards. Tongue smooth. Pectorals a little less 

 than, equal to or even a little longer than postorbital part of 

 head. Base of ventrals about midway between eye and base 

 of caudal. The middle and hinder dorsal and anal rays sub- 

 equal in length and much shorter than the rays in front. 

 Origin of dorsal above 2"^! divided ray of anal. Lateral line 

 without distinct keel on caudal peduncle. Caudal rounded. 

 Colour of alcohol specimens brownish, with a lateral silvery band, 

 especially distinct on the posterior half of the body, where it is 

 bordered superiorly by a dark stripe. A bluish black spot at 

 the base of the caudal fin. According to Bleeker a variety 

 occurs with black spots on head, back and sides. Length 450 mm. 



Nom. indig. : Tendrah, Djulong-djulong (Malay Batavia), 

 Katjangan, Lontjong (Javan.), Tuda laut (Bagan Api Api). 



Habitat: Singapore; Sumatra (Palembang, Banju Asin, 

 Taluk!, Bagan Api api!, Siboga, Tiku) ; Nias; Java-sea!; Java 

 (Batavia!, Samarang, Surabaya, Pasuruan); Bintang; Riouw; 

 Banka ; Borneo (Pamangkat, Sinkawang, Sungiduri, Pontianak, 



