hind the base of the ventrals. Caudal forked. Scales cycloid. 

 Luminous organs : an antorbital on the dorsal frontborder of 

 the orbit, on the frontborder of the praeopercle a larger dorsal 

 one, on the level of the lower margin of the eye. A smaller 

 ventral one below it on the level of the lower part of the 

 maxilla. Three in each branchiostegal series. 5 PO in a series 

 from the isthmus to the base of the ventrals. 2 PVO, one at 

 the lower opercular edge, slightly behind the second PO; the 

 other obliquely behind it at the ventral edge of the base of 

 the pectoral. PLO at the upper margin of the opercle. VLO 

 in the vertical through the ventral, midway between it and 

 the lateral line. 4 VO in a series from ventrals to anal, the 

 second of which is slightly displaced dorsally outside the 

 series. Above the last one a series of 3 SAO, angularly bent 

 and obliquely directed to the lateral line. A series of 6 AOa 

 followed behind the anal by a series of 3 AOp, which latter 

 is separated from 2 Prc on the lower part of the end of the 

 tail. Pol slightly behind last AOa in the lateral line. Between 

 adipose fin and caudal a luminous patch, a smaller one be- 

 tween AO and Prc. Blackish, fins lighter. Length 220 mm. 



Habitat: Banda Sea (1500 o M., vertical net)!. Indie 

 to 26 S. ; Pacific between 27 39' N. and 7 N. ; Atlantic 

 between 14 39' N. end 3 55' S. 



4. Myctophum pterotum (Alcock). 



? Scopelus brachygnathos Bleeker, Act. Soc. Sc. Indo-Neerl. I. 1856, Vischsoort. 



Menado p. 65 1 ). 



Scopelus (Myctophuni) pterotus Alcock, Ann. Mag. Nat. Hist. 1890, p. 217. 

 MyctopJmm fibiilatiim Gilbert & Cramer, Proc. U.S. Nat. Mus. XIX. 1897^.411. 

 Scopelus pterotus Alcock, Descr. Cat. Ind. Deep Sea Fishes, 1899, p. 267. 

 Myctophum fibulatum Gilbert, Bull. U.S. Fish. Comm. XXIV. (1903) 1905, p. 596. 

 Myctophum (Myctophum^ pterottim Brauer, Deutsche Tiefsee-Exp. Tiefseefische 



1906, p. 182. 

 Myctophum pterohtm Max Weber, Siboga-Exp. Fische 1913, p. 86. 



D. 11 13; A. 1719; P. 12 16; V. 8; L.I. 2834. 



Rather stout, compressed. Height 3 4 / 5 4, head about 3, 

 eye 2 3 / 4 3. Snout bluntly rounded, more than twice in eye. 

 Interorbital space nearly flat, i'/ 2 in eye. Mouth somewhat 



i) See Max Weber, Siboga-Expeditie. Fische, 1913, p. 669. 



