- 3i - 



E. similis G. O. S. var. armata n. var. ought to be named 

 here, and 2 new species are added : E. distingueiida n. sp. 

 and E. lamelliger a n. sp. 



The «Siboga» report contains a detailed account of 

 E . paragibba H. J. H., E. hemigibba H. J. H., E. pseudo- 

 gibba Ortm. and E. Sibogœ H. J. H.; E.Vallentini Stebb. 

 and E. similis G. O. S. var. armata are dealt with in the 

 preceding group ; the five remaining species must be men- 

 tioned or described. 



E. gibba G. O. S. — This species which has been on 

 the whole well described by Sars, is closely similar to 

 E. paragibba H. J. H. The female of E. gibba differs from 

 that of E. paragibba by having the keel on third antennu- 

 lar joint a little higher and less rounded, by being smaller, 

 and, judging from the colour of 

 specimens preserved in alcool, 

 by the colour in living specimens. 

 But the male copulatory organs 

 (Fig. 11) differ strongly in several 

 features from those in all other 

 species of the genus. The termi- 

 nal process in unusually small, 

 subcorneal, thick at the base and 

 with the distal part slender, acute 

 and suddenly bent forwards and 

 outwards ; the heel in very slender. 

 The proximal process is extre- 

 mely long and very strong, thi- 

 ckened at the base and then taper- 

 ing to the acute end ; somewhat 

 before the middle it is bent conspi- 

 cuously inwards, and somewhat 

 beyond the middle more outwards 

 and besides forwards, its distal third being almost straight. 

 The lateral process without any tooth beyond the middle. 

 From the outer angle of the distal rounded, rather broad 

 end of the median lobe originates a curious, very slender, 



(210) 



Fig. 11. Euphausia gibba 

 G.O.S. Inner and median 

 lobe of left copulatory or- 

 gan, from behind, p 2 . ter- 

 minal process; p 3 . proxi- 

 mal process ; p 4 . lateral 

 process; /. thin-skinned 

 ringer from the end of the • 

 median lobe. 



