— 22 — 



but not digged out in 1905). Two species are now added : 

 E. eximia n. sp. and E. americana n. sp. 



The two new species agree with E. Krohnii and differ 

 sharply from the four other species of the group — and 

 from every species of the genus — by having the conspi- 

 cuous lobe of first antennular joint pectinate, with 5 to 10 

 very slender, spiniform denticles. The three species may 

 be separated by the following diagnoses. 



E. Krohnii Brandt. — The lobe from first antennular 

 joint not only with the row of spiniform denticles along 

 the margin, but its outer angle is produced into an oblique, 



Fig. 4. Euphausia Krohnii Brandt. A. Inner lobe of left 

 copulatory organ, from behind; p 2 . terminal process; 

 p 3 . proximal process. B. Same lobe, from the inner side. 



thin process with about three similar denticles. Second 

 antennular joint above at each distal angle with an obli- 

 quely conical, conspicuous tubercle. The inner lobe of the 

 copulatory organs (Fig. 4) has the terminal process mode- 

 rately long and conspicuously widened towards the end 

 which is broadly rounded with a minute lateral tooth ; the 

 proximal process with three irregular, large teeth or pro- 

 cesses on the distal third of the inner margin, while the 

 most terminal part is quite flattened and much bent in a 

 direction vertical on that of the three teeth, and the end 

 itself rounded. — Length 14-19 mm. 

 Atlantic, Mediterranean. 



