EUPHAUSIA BKEMS. 239 



10. Euphausia brevis 11. J. H.\nsen. 

 Plate S, fi^s- l:i-lg- 



1905. Euphausia brevis H. J. H.wsen, Bull. IMus. Ocean. Monaco, no. 42, p. 15. 



Sta. 4685. Dec. 10, 1904. Lat. 21° 36.2' S., long. 94° 56' W. 300 fms. to .surface. 13 specimens. 

 Sta. 4686. Dec. 10, 1904. Lat. 22° 2' S., long. 95° 52' W. Surface. 31 specimens. 



Sta. 4687. Dec. 11, 1904. Lat. 22° 49.5' S., long. 97° 30.6' W. \ ^°°/"'- '° ''"^f"- ^2 ^P^""^'^°«- 



( 2125 tms. to suriace. / specmiens. 



Sta. 4688. Dec. 11, 1904. Lat. 23° 17.2' S., long. 9S° 37.5' W. Surface. 7 .«peeimcns. 



Sta. 4689. Dec. 12, 1904. Lat. 24° 5' S., long. 100° 20' \V. 300 fms. 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. to surface. 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° 57.3' 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' \V. Surface. 1 specimen. 



Sta. 4698. Dec. 24, 1904. Lat. 22° 50.4' S., long. 105° 31.7' W. Surface. 10 .^^pecimens. 



Sta. 4699. Dec. 25, 1904. Lat. 21° 39.5' S., long. 104° 29.8' W. 300 fms. to surface. 2 speeimen.s. 



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' \V. 300 fms. to sm-face. 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 moderatel}' long (fig. la), 

 proportionately broader and conspicuously longer than in the four preceding 

 species, with the lateral margins nearly straight or feebl,y sinuate, terminating 

 in a small or very small, very oblong-triangular rostrum somewluit or nuich 

 shorter than the breadth of second antennular joint. The median areti In'hind 

 the frontal plate is much vaulteil; tin- keel from the basal part of the rostrum 

 to the hind margin of the area namcMl is well de\-elo])ed. 



Eyes very distinctly smaller tlian in E. exiniia, brown or lilackisli l)i-own, 

 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 l)road as the eiul of the joint, bi-oader 

 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, sul)s])iniform process (fig. Ic); fre(|U(Mitly 

 the concave distal margin shows a tiny, angular projection usually terminating 

 in a short seta. Second peduncuhir joint with a ])roportionat(^ly ratlier long, 

 spiniform process originating above from the distal margin somewluit inside 



