>^"-" 



\ 



220 



STALK-EYED CRUSTACEA. 



i 



margin of the carapace projects but slightlj, 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 jE*. aiistrahs. 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 alcohol), 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 oE the 

 eye is of a very light color — yellowish, according to the sketch from life 

 made by Mr. Westcrgren. In E, mdralis 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, E. sculpiicauda 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 wdiole 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 



_ A 



E, australis the telson has an entirely different shape, the distal half tapering 

 off regularly to the tip, which is armed with two long setao ; the dorsal sur- 

 face does not display the honeycomb structure which is so conspicuous in 

 E. scidplicauda. 



Length of female, G6 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 (fern. juv.?). 



iC 



a 



3407 



^413 



885 

 1360 



U 



iC 



1 fem. 

 1 male. 





t 



J 



