268 DEEP SEA FISHES. 
of the anal there is a series of six separated by a short space from another 
series of three, which latter is separated from the two lanterns on the lower 
part of the base of the caudal; and above the sixth of the anal series on 
the lateral line there is a single one. On the caudal pedicel there is a 
luminous patch of varying extent behind the adipose and another behind 
the anal fin. 
Blackish; fins lighter; opercles silvery; iris brilliant with metallic 
reflections. 
Station. Latitude. Longitude. Depth. Temperature. 
3414 OSM AINE 96° 28’ W. Surface to 200 fathoms. 
3388 Toe GEN 79° 48’ W. 1168 sis 36.2° F. 
3437 27° 39’ 40” N. LTO! 80! Wie 628 oe 40° F. 
Myctophum atratum sp. n. 
DeU26 AL 19e V8 sb. 14a 40: 
There is so much resemblance between this fish and that described by 
Cocco, 1838, as Scopelus Benowsli that it would perhaps be better described 
by comparisons that shall set forth the respects in which it differs from 
Cocco’s species. Accepting for the purpose the identification and figure 
given by Liitken in his admirable work on the Scopelini, in the Spolia 
Atlantica, 1892, it will be seen that in the outlines of the body, in the size 
of the eye, in the formule, the length of the pectorals, the positions of 
dorsal and anal fins and of the lanterns, in the two lanterns at the base of 
the caudal, and in other features the two forms agree tolerably well. On 
M. atratum, however, the shape is a little less compressed, the lanterns 
at the base of the caudal are farther apart— the upper of the two being 
on the end of the lateral line, the luminous organ on the upper edge of the 
caudal pedicel is smaller and nearer the caudal fin, the series of four lan- 
terns from the lower part of the base of the pectoral directly backward to 
a point above the origin of the anal has a larger distance between the first 
and second lanterns — it being equal to the space occupied by the hinder 
three, the group of three in the lower part of the cheek behind the maxil- 
lary more nearly forms an equilateral triangle, and there are but five 
lanterns in the posterior anal series. Apparently the eye is a trifle larger, 
being rather more than two fifths of the length of the head, and it interferes 
somewhat more in the profile of the crown. The middle of the interorbital 
space is occupied by a luminous organ. The maxillary is broad at the hind 
