Sta. 4652, Nov. 11, 1904. Lat. 5° 44.7' S., long. S2° 39.5' \V. 

 Sta. 4655. Nov. 12, 1904. Lat. 5° 57.5' S., lung. S0° 50' \V. 



EUPHAUSIA LAMELLIGERA. 251 



Sta. 4650. Nov. 10, 1904. Lat. 5° 22' S., long. 84° 39' \V. •! '^"'^f' ^ ^'i'^"™^"' 



( 300 tms. 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. 



[ Surface. 2 specimens. 



( 400 fms. to surface. 4 sjieciraens. 



■ ,, ,,,.- ,. ,., ,,,,,, , . _o,„.,^, , ^..r,,,..- ' Surface. 22 specimens. 



Sta.46oi. Auv. 12, 1904. Lat. i 12,./ S., long. b4 9 \\ . -, , \- , ■ 



{ 300 tms. to surtace. 1 spccunen. 



Sta. 4659. Nov. 14, 1904. Lat. .S° .54.5' S., long. S6° 5.5' \V. 300 fms. to surface 4specimens. 



Sta. 4661. Nov. 15, 1904. Lat. 10° 17' S, long. !SS° 2' \V. Surface. 1 specimen. 



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

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

 is almost transverse, being onlj- feebly produced at the middle with an extrenieh' 

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

 highly vauUed and, seen fi'om the side, with the ui^per margin angular (fig. 4b), 

 but a real keel is not ilevelojietl. 



The eyes are large. — The antennular ])cduncles are somewhat robust; 

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

 is situated much ajjove 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 upi)er surface of the third joint ; while seen from the .side (fig. 4c) 

 its lower margin I'uns almost along the mitldle of tlic side of the third joint, so 

 that the proximal ujijier fourtii or still more of the whole outer siu'face of the 

 joint is covered: in immature .specimens this lamella is smaller antl 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 tlie joint, witli the 

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

 uj^per margin being al)out 100°. — The antennae nearly as in E. dislinguenda. 



Third aljdominal segment with a dorsal, slender, spiniform, compn^ssed 

 process a little f)r scarcely mon^ tlutn one tliiril as long ;is the next segment; 

 f<iinth and lifth segments without any vestige of dorsal denticles. Sixth seg- 

 ment long, e\en a little moi-e than twice as long as deep. — Exopoil of uropods 

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



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

 laritj' to those of E. distiriguinda, but there are several differences. The termi- 

 nal process has a rather long foot, l)ut its heel is somewhat short and curxed, 



