220 STALK-EYED CRUSTACEA. 
margin of the carapace projects but slightly, leaving the ocular segment 
exposed, and not forming anything that can be truly called a rostrum. 
The eye with its peduncle attains a much greater degree of perfection 
than in Z. australis. The peduncle is broadly expanded at the distal end so 
as to assume a triangular form, the distal extremity equalling in width the 
entire length of the peduncle. The upper side is flattened, and on the inner 
margin just back of the cornea, there is a slender ocular papilla. The eye 
itself is as broad as, or even a little broader than, the distal end of its 
peduncle, reniform, dark chestnut in color (in alcoliol), and perfectly faceted. 
The above description applies to the type specimen, a female. In the only 
male obtained, the eyes are not so well preserved, but the peduncle appears 
to be broader near the proximal end than it is in the female. In immature 
individuals, like the one represented on Plate K, Fig. 2, the pigment of the 
eye is of a very light color — yellowish, according to the sketch from life 
made by Mr. Westergren. In £. australis the eye-stalks are cylindrical, the 
cornea narrower than the stalk and the pigment and facets of the eye 
are very imperfectly developed. 
In the form of the telson, 2. seu/pticauda exhibits one of its most marked 
peculiarities. The proximal part of this segment is deeply furrowed for a 
little less than one half its length, the furrow being bounded on each side by 
an elevated, rounded ridge. A low median keel, beginning in the anterior 
furrow, runs backward to the posterior end of the telson. A constriction a 
little way in front of the tip divides off a terminal plate which is broadly 
rounded at the end, its lateral margins being concave. The whole dorsal 
face of the telson from the posterior end of the anterior ridges to the termi 
nal plate is beautifully ornamented with a net-work of ridges enclosing 
honeycomb-like cells. The distal half of the segment is armed with mar- 
ginal spines, which are obsolete on the rounded posterior extremity. In 
E. australis the telson has an entirely different shape, the distal half tapering 
off regularly to the tip, which is armed with two long setz ; the dorsal sur- 
face does not display the honeycomb structure which is so conspicuous in 
LE. sculpticauda. 
Length of female, 66 mm. ; carapace, measured from the lower angle of 
the orbit to the posterior end of the lateral wings, 23 mm. 
Station 2619 Hyd. 1000 fathoms (Tanner net). 1 (fem. juv. ’). 
“3407 880 =< 1 fem. 
“34138 1360" 1 male. 
