242 THE SCHIZOPODA. 



acters and especially by the copulatory organs. The antennular peduncles 

 are a little longer and distinctly more slender than in E. lucens, with the second 

 joint longer than the third, while in E. lucens it is not longer than the third; 

 finally the lobe of first joint is a little less conspicuous than in E. lucens and differs 

 slightly in shape. The rostrmn, \'iz. the triangle at the middle of the front 

 margin of the carapace, is generally more pronounced and more produced in 

 E. lucens than in E. pacifica. And the copulatory organs afford excellent char- 

 acters, but here I will only refer to the brief descriptions with figures of the most 

 important parts of the copulatory organs of E. pacifica, E. lucens, and a third 

 closely allied species, E.frigida H. J. H., found in my above-mentioned paper. 

 Distribulion. — The species is distributed in the temperate and boreal 

 North Pacific; it is very common at Japan. The Copenhagen Museum possesses 

 considerable material from seven localities at Formosa and especially from near 

 Japan and Corea northwards to Lat. 39° N.; a future report on the fine material 

 belonging to the U. S. Nat. Museum will contain a fuller account of its distribu- 

 tion. But here it may be stated that the specimens from four localities in the 

 North Pacific — between Lat. 35° 19§' N. and Lat. 35° 36|' N., long. 125° 211' W. 

 and 124° 45V W. — referred by Ortmann (in his paper in 1894) to Euphausia 

 splendens Dana belong to E. pacifica. 



18. Euphausia tenera II. J. Hansen. 



1885. Euphausia gracilis G. O. Sars, Challenger Rept., 13, p. 89, pi. 15, figs. 12-23 (not E. gracilis Dana). 

 190.5. Euphausia tenera H. J. Hansen, Bull. Miis. Oc&in. Monaco, no. 42, p. 9. 

 1910. Euphausia tenera H. J. Hansen, Sibo'ga-Exp., 37, p. 9.5, pi. 14, figs. 3a-3e. 



Sta. 4.587. Oct. 12,1904. Lat. 20° 42' N., long. 107° 25' W. 300 fms. to surface. 7 specimens. 



Sta. 4588. Oct. 12, 1904. Lat. 19° 52' N., long. 106° 22' W. Surface. 59 specimens. 



Sta. 4596. Oct. 14, 1904. Lat. 16° 47' N., long. 100° 27' W. Surface. 5 specimens. 



Sta. 4598. Oct. 15, 1904. Lat. 15° 58' N., long. 98° 13' W. 300 fms. to surface. 1 specimen. 



Sta. 4619. Oct. 20, 1904. Lat. 7° 15' N., long. 82° 8' W. Surface. 1 specimen. 



Sta. 4634. Nov. 4,1904. Lat. 4° 35.4' N., long. 83° 32.3' W. 300 fms. to surface. 1 specimen. 



Sta. 4635. Nov. 4, 1904. Lat. 3° 52.5' N., long. 84° 14.3' W. Surface. 5 specimens. 



Sta. 4637. Nov. 5, 1904. Lat. 1° 31' N., long. 86° 32' W. 300 fms. to surface. 27 specimens. 



Sta. 4638. Nov. 6, 1904. Lat. 0° 27' N., long. 87° 13' W. 300 fms. to surface. 21 specimens. 



Sta. 4640. Nov. 6,1904. Lat. 0° 39.4' S., long. 88° 11' W. Surface. 134 specimens. 



Sta. 4644. Nov. 7, 1904. Lat. 2° 13.3' S., long. 89° 42.2' W. Surface. 22 specimens. 



Sta. 4646. Nov. 8, 1904. Lat. 4° 1.6' S., long. 89° 16.3' W. \ '^"^^f *"■ f specimens. 



( 300 fms. to surface. 14 specimens. 



Sta. 4648. Nov. 9,1904. Lat. 4° 43' S., long. 87° 7.5' W. Surface. 10 specimens. 



Sta. 4649. Nov. 10, 1904. L.at. 5° 17' S., long. 85° 19.5' W. 300 fms. to surface. 1 specimen. 



Sta. 4650. Nov. 10, 1904. Lat. 5° 22' S., long. 84° 39' W. 300 fms. to surface. 11 specimens. 



Sta. 4652, Nov. 11, 1904. Lat. 5° 44.7' S., long. 82° 39.5' W. \ ^^^^f^' ^ ^^Pecimens 



( 200 fms. to surface. 1 specimen. 



Sta. 4657. Nov. 13, 1904. Lat. 7° 12.5' S., long. 84° 9' W. 300 fms. to surface. 4 specimens. 



Sta. 46.59. Nov. 14, 1904. Lat. 8° 54.5' S., long. 86° 5.5' W. I '^"li^f ®- ^ specimens. 



( 300 fms. to surface. 4 specimens. 



