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 Indie; At- 

 lantic; Gulf of Guinea. 



15. Myctophum malayanum (M. Web.). 



Diaplms malayanus Max Weber, Siboga-Exp. Fische, 1913, p. 89. 



D. 15; A. 15; P. 10; V. 9; L.I. circa 35. 

 Height 4 '/a, head 3 3 /, , eye 3 3 / 5 , ! /s 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 M. 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 1 / 3 f 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 



