Sta. 4652. Nov. 1 1, I'JOl. L:it. 5° 44.7' S., long. S2° 39.5' W 



EUPHAUSIA LAMELLIGERA. 251 



Sta. 41)50. Nov. 10, I'JOl. Lat. 5° 22' S., long. S4° 39' W. -j '^"^"^i.^""' ] ■'"""'"'■"• 



' ( 300 fnis. to surface. 3 specimens. 



Surface. 2 specimens. 



100 fms. to surface. 31 specimens. 



200 fms. to surface. 23 specimens. 



400 fms. to surface. 15 specimens. 



Sta. 4655. Nov. 12, 1904. Lat. 5° 57.5' S., long. SO" 50' W. -] '';,\''^f "• ,^ ^P''^""^"^- 



' ( 400 fms. to surlace. 4 speeunens. 



Sta. 4657. Nov. 12, 1904. Lat . 7° 12.5' S., long. 84" 9' W. ] '^"ff " ^" «P-™«"«- . 



' ( 300 fms. to surface. 1 sjiocuncn. 



Sta. 4659. Nov. 14, 1904. Lat. S° 54.5' S., long. 86° 5.5' W. 300 fms. to surface. 4 specimens. 



Sta. 4661. Nov. 15, 1904. Lat. 10° 17' S., long. 88° 2' W. Surface. 1 specimen. 



Description. — Body slender. — The frontal plate (fig. 4a) is very short, 

 but laterally somewhat produced with right angles, while the long front margin 

 is almost transverse, being only feebly produced at the middle with an extremely 

 obtuse angle, and consequently no rostrum is developed. The gastric area is 

 highly vaulted and, seen front the side, with the upper margin angular (fig. 4b), 

 but a real keel is not developed. 



The eyes are large. — The antennular peduncles are somewhat robust; 

 the basal joint is much raised above towards the terminal margin (fig. 4c), which 

 is situated much above the base of second joint and produced in a moderately 

 small lobe projecting upwards, forwards, and outwards (fig. 4d); the end of the 

 lobe is more or less distinctly cleft. Second joint at the end furnished with a 

 very large, movable lamella which, seen from above (fig. 4d, 1.), is subtriangular, 

 reaching almost to the inner margin, and covering the outer proximal half or 

 still more of the upper surface of the third joint; while seen from the side (fig. 4c) 

 its lower margin runs almost along the middle of the side of the third joint, so 

 that the proximal upper fourth or still more of the whole outer surface of the 

 joint is covered; in immature specimens this lamella is smaller and in about 

 half-grown individuals quite small. The third joint, seen from the outer side 

 (fig. 4c) with the dorsal keel high, occupying the distal half of the joint, with the 

 front margin long and a little oblique, the angle between this margin and the 

 upper margin being about 100°. — The antennae nearly as in E. distinguenda. 



Third abdominal segment with a dorsal, slender, spiniform, compressed 

 process' a little or scarcely more than one third as long as the next segment; 

 fourth and fifth segments without any vestige of dorsal denticles. Sixth seg- 

 ment long, even a little more than twice as long as deep. — Exopod of uropods 

 a little longer than the endopod and conspicuously shorter than the telson. 



The copulatory organs (Plate 8, fig. 4e; Plate 9, fig. la) show some simi- 

 larity to those of E. distinguenda, but there are several differences. The termi- 

 nal process has a rather long foot, but its heel is somewhat short and curved. 



