EUPHAUSIA GIBI50IDES. 253 



Furthermore the species was taken twice in 1S97 by Dr. Agassiz, viz.: — 



Fiji Islands. Dec. 11, 1897. 6 iii. South of Suva light.sliip. 1.50 fiiia. 4 specimens. 

 Fiji Islands. Dec. 11, 1897. 3 m. South of Suva lightship. 100 tms. 1 specimen. 



Description. — Body rather stout. — Frontal plate (fig. 2a) is very short, 

 subangular at each side; anteriorly it is produced into a rather long rostrum, 

 the basal part of which is a comparatively somewhat large triangle a little broader 

 than long, while its distal portion is spiniform. The gastric area is, seen from 

 the side (fig. 2b), highly vaulted; the keel from the middle of the rostrum and 

 along that area is sharp. 



The eyes are large. — The antennular peduncles moderately robust; the 

 first joint is raised considerably above towards the upper terminal margin (fig. 2c), 

 the major part of which is nearly transverse (fig. 2d), but the inner part is pro- 

 duced into a moderately long lobe projecting forwards and somewhat upwards, 

 tapering in breadth to beyond the middle where it abruptly bends much out- 

 wards, this terminal part forming an oblong, acute triangle directed more out- 

 wards than forwards. Second joint, seen from above (fig. 2d), is as usually 

 with the inner margin somewhat longer anteriorly than the outer, but the 

 terminal upper margin is not oblique, but transverse, even a little and some- 

 times considerably concave, extending to about the outer margin of third joint, 

 where it suddenly bends in the proximal direction parallel with the last-named 

 margin; in this way a kind of short, broad lobe is circumscribed, which covers 

 the proximal part of the upper surface of the third joint with the exception of 

 its outermost portion; and the outer part of tliis lobe is produced slightly or 

 conspicuously forwards, when the transverse terminal margin is considerably 

 concave. The third joint, beginning only a little from the lobe of second joint, 

 has the dorsal keel high; it rises in height to somewhat beyond the middle 

 and is there produced into a slender, porrected tooth; the front margin of the 

 keel is very oblique and deeply incised just below the upper end, the incision 

 limiting the tooth mentioned. — The antennal squama is moderately broad, 

 at most reaching the middle of third antennular joint and without any marginal 

 tooth at the somewhat broad end; the spiniform process from the outer side of 

 the peduncle is long, about half as long as the squama. 



First and second abdominal segments at the middle of the dorsal posterior 

 margin are produced a little, but the protuberance is feebly rounded, not angular. 

 Third segment with a short dorsal process which at the base is a carinated plate 

 and distally slender and almost compressed, acute. Fourth and fifth segments 

 without vestige of any dorsal tooth. Sixth segment moderately long, with the 



