EAE 
touching the lateral line as also Pol, which lies above the last 
organ of the anterior group of AO. Length 90 mm. 
Habitat: Madura Sea (289 M.)!. — Tropical Indic; At- 
lantic; Gulf of Guinea. 
15. Myctophum malayanum (M. Web.). 
Diaphus malayanus Max Weber, Siboga-Exp. Fische, 1913, p. 89. 
Dig ees Pros Ne oy Leh circa 35: 
Height 4'/,, head 3°%/,,, eye 3°/,, '/, longer than snout, which 
is half as broad as interorbital space. Upper jaw slightly 
Fig. 65. Myctophum malayanum (M. Web.). — Antorbital organ between eye 
and nostrils, a of JZ. malayanum, b of M. caeruleum. 
dilated at its posterior end, which surpasses eye by more 
than one eye diameter. Praeopercular border narrow. Origin 
of dorsal before origin of ventrals, both before middle of 
length. Origin of anal below posterior end of dorsal, somewhat 
before beginning of last '/, of length, its end behind adipose 
fin. Scales cycloid. Pectorals far below middle of height, 
extending to origin of ventrals. Luminous organs: a large antor- 
bital organ, hatchet-shaped on account of its dorsal part, which is 
dorsally bent over the nostril, but broadly separated from the 
opposite organ, it reaches ventrally to the ventral border of 
the eye. Two operculars close together above each other, the 
ventral one, which is smaller, behind end of upper jaw, 3 
branchiostegals. 5 PO in an irregular series, the fourth far 
outside it above the space between the third and fifth, the 
distance between the first and second by far the largest. The 
2 PVO in an oblique line, the superior and posterior at the 
ventral base of the pectoral, the inferior before and slightly 
below it, close to the first PO. PLO between lateral line and 
