165 
10. Myctophum pristilepis (Gilbert & Cramer). 
Myctophum (Dasyscopelus) asperum Bleeker, Atl. Ichth. VI. livr. 27. 1875, p. 
159 (nec Richardson). 
Dasyscopelus pristilepis Gilbert & Cramer, Proc. U.S. Nat. Mus. XIX. 1897, p. 412. 
Dasyscopelus pristilepis Gilbert, Bull, U.S. Fish. Comm. XXIII, 2. 1903 (1905), 
p- 600. 
Myctophum pristilepis Gilbert, Bull. Mus. Comp, Zool. Harvard Coll. XLVI. 
1906, p. 259. 
Myctophum pristilepis Max Weber, Siboga-Exp. Fische, 1913, p. 88, 669. 
eA 
ao 
Fig. 64. Myctophum pristilepis (Gilb. & Cram.) and a ventral scale. 
Ps 
Die — 63s NE es P3203) Vis 8s" Tc. T. a5— 38. 
Height 4'/,, head 31/,, eye 23/;; snout bluntly rounded, very 
short, less than '/, of eye, its tip nearly on a level with lower 
border of pupil. Interorbital space nearly flat. Mouth very 
oblique. Upper jaw reaching to vertical through posterior 
margin of eye. Origin of dorsal before middle of body, above 
or slightly behind origin of ventrals, ending before origin of 
anal. Adipose fin opposite to posterior part of anal. Caudal 
forked. Scales large, firm, ctenoid, their edges with rather 
stout teeth, absent or obsolescent on the scales of the lateral 
line, which are vertically enlarged. Large scales on opercles 
and cheeks. Luminous organs: an antorbital at the ventral 
part of the frontal margin of the orbit, a dorsal one only 
evident in the young (Gilbert). Two operculars, a larger dorsal one 
slightly below the level of the inferior margin of the eye, 
the much smaller ventral one behind the angle of the upper jaw. 
3 branchiostegal organs; 5 nearly equidistant PO, the fifth out- 
side and somewhat upward of the series between isthmus and 
ventral. Posterior PVO immediately before lower base of pec- 
toral, the anterior obliquely before and below it, above the 
