169 



Scopelus engraulis Alcock, Ann. Mag. Nat. Hist. (6) VIII. 1891, p. 129. 



Descr. Catal. Indian Deep-Sea Fishes, 1899, p. 161. 



Scopelus (Nyctophus] caeruleus Liitken, Spolia Atlantica, Scopelini, 1892, p. 260. 

 Lampanyctus caertileus Goode & Bean, Oceanic Ichthyol. 1896. p. 81. 

 My c fop hum (Diaphus) caeruleum Brauer, Deutsche Tiefsee-Exp. Tiefseefische 



1906, p. 217. 

 Diaphus caeruhiis Max Weber, Siboga-Exp. Fische, 1913, p. 88. 



D. 1214; A - 15; p - ioi2; V. 89; L.I. 37. . 



Height 4 3 / 5 5, head 3 ! / 2 3 <2 /3> e ye 4 5> more than half its 

 diameter longer than snout, which is half as broad as interorbital 

 space. Upper jaw slightly dilated at its hinder end, which sur- 

 passes the eye by more than one eye diameter. Origin of 

 dorsal above origin of ventrals or slightly before or behind it; 

 in the middle of the distance between snout and adipose fin 

 or behind it. Origin of anal somewhat behind end of dorsal, 

 before last ! / 3 of length, ending below adipose fin. Pectorals 

 far below middle of height, not reaching origin of ventrals 

 (after Brauer: reaching on ventrals). Caudal forked. Scales 

 cycloid. Luminous organs divided by a black septum. An 

 antorbital organ, narrowed between eye and nostril, slightly 

 dilated dorsally, more dilated ventrally, extending on ventral 

 border of eye. 2 operculars, quite close above each other, the 

 ventral one, which is smaller, behind end of upper jaw; 3 

 branchiostegals ; 5 PO, the fourth outside the series above the 

 space between the third and the fifth. The 2 PVO in an 

 oblique line, the superior at the ventral base of the pectoral, 

 the inferior above and behind the first PO. PLO above base 

 of pectoral, nearer to it than to lateral line. 5 VO, the second 

 and third outside the series, the third higher than the second. 

 1 1 AO in two groups, the anterior above the anal with 6 

 organs, the anterior and posterior of which are situated higher 

 up outside the series, the posterior group behind anal contains 

 5 organs, separated from them the 4 Prc, which are arranged 

 in a continuous, semicircular series, the hindermost in the 

 middle between lateral line and ventral profile. VLO between 

 lateral line and ventral, nearer to lastnamed; the 3 SAO in 

 an oblique ascending line, the most ventral between last VO 

 and anus, the uppermost far distant from lateral line, as also 

 the Pol, which lies close above and behind the last organ of 

 the anterior AO. Silvery, back blackish blue. Fins hyaline. 

 Length more than 150 mm. 



