_ 29 - 



tip scarcely acute. Lobe from first antennular joint is a 

 small, oblong-triangular, acuminate and very acute' pro- 

 cess ; second and third antennular joints more slender and 

 a little longer than in E. lucens ; second joint distinctly 

 longer than the third. Terminal process of the copulatory 

 organs (Fig. 10) moderately short, a little thicker than in two 

 other species, a little expanded towards the end, with the 

 outer ramus only a short tooth and the inner very much 



Fig. io. Euphausia pacifica n. sp. A. Inner and median 

 lobe of left copulatory organ, from behind, p' 2 . terminal 

 process; p 3 . proximal process; p''. lateral process. 

 B. Inner lobe, from the inner side. 



longer but bent much forwards. The proximal process 

 somewhat longer than the terminal, without any secon- 

 dary branch beyond the middle, while the distal part is 

 somewhat expanded, forming a plate which is much lon- 

 ger than broad, with the terminal margin rounded and 

 only very feebly emarginate somewhat from the broadly 

 rounded end. Lateral process without tooth on the distal 

 part. — Length of one of the largest specimens 22 mm . 



This species is distributed in the temperate and boreal 

 North Pacific ; it is very common at Japan. The specimens 

 referred in 1894 by Ortmann to E. splendens Dana belong 

 certainly to E. pacifica. 



(210) 



