166 
second PO, above and before upper base of pectoral, nearly 
midway between it and the lateral line. 4 VO in a series 
between ventrals and anus. 10—13 AO in two groups, the 
anterior group, situated above the anal, contains 6—8, the 
posterior group, beginning above last anal ray or behind it, 
contains 3—5 organs, the most frequent arrangement being 
7 +4. Widely separated from them the two Prc, which are 
rather close together, obliquely arranged, the posterior one in 
the middle between the lateral line and the ventral profile. 
VLO midway between origin of ventral and lateral line. 3 SAO 
in a curved line with the concavity forward, the anterior above 
and slightly before the last VO, the middle one in the vertical 
through the anus, the uppermost immediately below lateral 
line. Pol immediately below the lateral line, about above last 
AO of the anterior group. An infracaudal luminous patch. 
Silvery, snout yellowish white, top of head and back blackish. 
Length 75 mm. 
Habitat: Macassar Straits (surface)!; Halmahera Sea 
(1000—o M., vertical net)!; Banda Sea (surface)!; Arafura Sea 
(surface)!; Bali, Celebes and Batjan (Bleeker). — Mauritius; 
Hawaian islands. 
11. Myctophum dumerili (Blkr.). ?) 
Scopelus Dumerili Bleeker, Act. Soc. Scient. Ind. Neerl. I. 1856, Beschr. Vissch. 
Menado, p. 66. 
Myctophum nocturnum Poey, Mem. Hist. Nat. de Cuba 1860, II. p. 426. 
Myctophum (Scopelus) Dumerili Bleeker, Atl. Ichth. VI. livr. 27. 1875, p. 158. 
Lampanyctus lacerta Goode & Bean, Oceanic Ichthyology 1895, p. 81. 
? Diaphus urolampus Gilbert & Cramer, Proc. U.S. Nat. Mus. XIX. 1896, p. 408. 
Myctophum (Diaphus) lacerta Brauer, Deutsche Tiefsee-Exp. Tiefseefische 1906, 
pPw2td: 
Diaphus nocturnus Gilbert, Bull. Mus. Comp. Zool. Harvard Coll. XLVI. 1906, 
p- 255. 
D. 15—16; A. 15—16; P. 12; V. 8—9;.L. 1. about37. 
Height more than 5, head 3'/,. Eye 3—31/,, more than 1/, 
longer than snout. Upper jaw scarcely dilated at its hinder end, 
nearly reaches to the praeopercular margin, which is oblique. 
Dorsal in the middle of the body, its origin before middle, 
I) See Max Weber, Siboga-Expeditie Fische 1913, p. 670. 
