242 DEEP SEA FISHES. 
On the body the structure of the light organs differs to some extent 
from that obtaining on the caudal region. On the latter, single ones, those 
not in groups, may be described as vertically oblong black areas in the 
middle of each of which a circular yellow pupil is situated; the groups are 
similar, but the black spot is larger and includes a row of several pupils. 
On the body the organs have the appearance of vertically subelliptical or 
oblong whitish or bluish translucent areas, the upper end of each of which 
contains the yellow organ. The structure approaches that of the same 
organs on Argyropelecus and Polyipnus. The number of the organs is one 
hundred and twenty-two (one hundred and twenty-four if the nasal spots 
are included); they are arranged as follows: six in each branchiostegal 
series, three plus four on each side of the isthmus to the shoulder, seven 
behind the shoulder to a point above the vent, eleven between the isthmus 
and the vent, a group of five on each side above the vent, and on each side 
of the caudal region a group of three above the anterior rays of the anal 
followed by a row of sixteen, one to each muscle band, the hindmost lying 
at the end of the base of the anal, followed at the short rays of the caudal by 
a group of four which in turn is followed by a single one. The round spot 
of black below the nostrils in front of the eye lacks the yellow centrum. 
Snout whitish, belly and remainder of the head blackish, muscular 
portions flesh color (from dermal abrasion), fins light yellowish. 
Number. Latitude. Longitude. Depth. 
540 35° 19/ 30” N. 125° 21’ 30” W. 300 fathoms to the surface. 
Maurolicus lucetius sp. n. 
Plate J, fig. 2. 
Brini9Ds14s VAv SE Ver ares. 
The form of this species is about as much elongate and compressed as 
that of MZ. attenwatus. The depth is one sixth and the width one ninth of 
the total length. Head compressed, length one and three fourths times its 
depth, or nearly one fourth of the total length, slightly concave between the 
eyes, vertical on the cheeks; chin rising forward. Snout pointed, as long 
as the eye, end formed by the lower jaws, which are longer than the upper 
and in which the symphyseal angle is prominent. Eye large, two sevenths 
of the length of the head, twice as wide as the interorbital space. Mouth 
wide; maxillaries tooth bearing, broad, making a wide and regular curve 
