EUPHAUSIA BREVIS. 239 
16. Euphausia brevis H. J. Hansen. 
Plate 8, figs. la—lg. 
1905. Euphausia brevis H. J. HANsEN, Bull. Mus. Océan. Monaco, no. 42, p. 15. 
Sta. 4685. Dec. 10, 1904. Lat. 21° 36.2’S., long. 94° 56’ W. 300fms.tosurface. 13 specimens. 
Sta. 4686. Dec. 10, 1904. Lat. 22°2’S., long. 95°52’ W. Surface. 31 specimens. 
Mim Dec. 11, 1904, Lat. 22°40.5/S., long. 97°30.6" W. 4 200 ‘ms: te surface. 16 specimens. 
( 2125 fms. to surface. 7 specimens. 
Sta. 4688. Dec. 11, 1904. Lat. 23° 17.2’S., long. 98° 37.5’ W. Surface. 7 specimens. 
Sta. 4689. Dec. 12, 1904. Lat. 24° 5’S., long. 100° 20’W. 300fms.to surface. 21 specimens. 
Sta. 4690. Dec. 12, 1904. Lat. 24° 45’S., long. 101° 45’ W. Surface. 11 specimens. 
Sta. 4691. Dec. 13, 1904. Lat. 25° 27.3’S., long. 103° 29.3’ W. 300 fms. tosurface. 17 specimens. 
Sta. 4692. Dec. 13, 1904. Lat. 25° 40.4’S., long. 104° 1.3’ W. Surface. 1 specimen. 
Sta. 4694. Dec. 22, 1904. Lat. 26° 34’ S., long. 108° 57.38’ W. Surface. 11 specimens. 
Sta. 4695. Dec. 23, 1904. Lat. 25° 22.4’S., long. 107° 45’ W. 300 fms. to surface. 4 specimens. 
Sta. 4696. Dec. 23, 1904. Lat. 24° 40.3’S., long. 107° 5.3’ W. Surface. 1 specimen. 
Sta. 4698. Dec. 24, 1904. Lat. 22° 50.4’S., long. 105° 31.7’ W. Surface. 10 specimens. 
Sta. 4699. Dec. 25, 1904. Lat. 21° 39.5’S., long. 104° 29.8’ W. 300 fms. to surface. 2 specimens. 
Sta. 4700. Dec. 25, 1904. Lat. 20° 28.8’S., long. 103° 26.3’ W. Surface. 9 specimens. 
Sta. 4701. Dec. 26, 1904. Lat. 19° 11.5’ S., long. 102° 24’ W. 300 fms. to surface. 1 specimen. 
Sta. 4702. Dec. 26, 1904. Lat. 18° 39.5’ S., long. 102° W. Surface. 11 specimens. 
Sta. 4730. Jan. 20,1905. Lat. 15°7’S., long. 117° 1.2’ W. 300 fms. to surface. 3 specimens. 
Sta. 4734. Jan. 22,1905. Lat. 17° 36’S., long. 122° 35.6’ W. 300 fms. to surface. 1 specimen. 
Sta. 4735. Jan. 22, 1905. Lat. 18° 16’S., long. 123° 34.4’ W. Surface. 33 specimens. 
Sta. 4736. Jan. 23, 1905. Lat. 19° 04’S., long. 125° 5.4’ W. 300 fms. to surface. 10 specimens. 
Sta. 4738. Jan. 24, 1905. Lat. 20° 26.5’ S., long. 128° 30.2’ W. Surface. 21 specimens. 
Description.— The frontal plate is broad and moderately long (fig. 1a), 
proportionately broader and conspicuously longer than in the four preceding 
species, with the lateral margins nearly straight or feebly sinuate, terminating 
in a small or very small, very oblong-triangular rostrum somewhat or much 
shorter than the breadth of second antennular joint. The median area behind 
the frontal plate is much vaulted; the keel from the basal part of the rostrum 
to the hind margin of the area named is well developed. 
Eyes very distinctly smaller than in EF. eximia, brown or blackish brown, 
thus lighter than in the four preceding species.— The antennular peduncles 
comparatively thick, similar in both sexes. The first joint distinctly less than 
twice as long as broad; its terminal lobe is directed vertically upwards or upwards 
and somewhat forwards, it is about half as broad as the end of the joint, broader 
than high, with the terminal margin more or less deeply and obliquely concave, 
the distal inner part being triangular, somewhat produced and its angle terminat- 
ing in an acute point or short, spiniform process, while its outer distal angle is 
produced into a somewhat longer, subspiniform process (fig. 1c); frequently 
the concave distal margin shows a tiny, angular projection usually terminating 
in a short seta. Second peduncular joint with a proportionately rather long, 
spiniform process originating above from the distal margin somewhat inside 
