94 



as in E. diomedecc^ its lateral margin. The lateral process is smaller than in E. diomedca:, while 

 the distal half of the median lobe, seen from the side (fig. i r), reminds of the head of a bird 

 on a somewhat short and thin neck and with a deep, somewhat short, much curved and very 

 acute beak, this terminal part being somewhat strongly chitinized; it may be added that when 

 the organ is totally folded out and seen from behind as in fig. i b the beak cannot be observed, 

 as it then is hidden by the "head". The figures show that the inner (lower) half of the setiferous 

 lobe is distally somewhat peculiarly shaped. 



Length ii — 12 mm. 



Remarks. — This species is easily separated from more than half-grown specimens of 

 E. dioviedecc by having no tubercles on the second antennular joint and by the structure of the 

 copulatory organs, the essential points as to these being the quite unique shape of the distal 

 part of the median lobe and the fact that the protuberance from the proximal part of the 

 terminal plate of the proximal process is directed obliquely backwards, while in E. dionicdea 

 the spiniform tooth originates at the base of the narrower plate and projects obliquely forwards. 



In the Monaco-paper I wrote: "Second antennular joint has both distal angles 



either obtuse or each armed with an obliquely conical tubercle", which shows that I had not 

 discovered that the existence or non-existence of these tubercles is a specific character, even of 

 high value. But a later study of the copulatory organs having proved that two species were 

 at hand, I looked for other characters and found the difference in the second antennular joint. 

 Fortunately the name E. mittica can be kept for the Monaco-specimens. 



Distribution. — I have seen specimens of this species from the Atlantic, the Indian 

 Ocean and the Pacific, but a more detailed account of this topic must be postponed to a 

 subsequent occasion. 



/;. Species with a single pair of lateral denticles on the carapace and 

 without any process from the dorsal hind margin of third abdominal 

 segment. 



8. Euphausia siviilis G. O. Sars, var. crassirostris n. PI. XIV, figs. 2 a — 2c. 



18S3. Euphausia siinilis G. O. Sars, Forh. Vid. Selsk. Christiania for 1S83, N" 7, p. 13. 

 1885. Eupliausia siinilis G. O. Sars, Challenger Rep. Vol. XIII, p. 79, PI. XIII, figs, i- — 6. 



Stat. 85. June 17. Lat. o°36'.5S., long. iig°29'.5E. 754 m. Plankton, i scarcely half-grown 



specimen. 

 Stat. 243. December 2. Lat. 4° 30.2 S., long. 129° 25' E. Hensen vertical net, from looo m. 



to surface. 1 immature female. 

 Stat. 276. January 9. Lat. 6°47'.5 S., long. i28°4o'.5E. Hensen vertical net, from 750 m. 



to surface, i immature male. 



According to my examination of Sars' type of this species in the British Museum his 

 fig. 2 is not quite correct ; he figures the rostrum a little too long as compared with the frontal 

 plate, furthermore the inner process of the lobe from first antennular joint is a little longer 

 and more curved outwards than on his figure (fig. 2). I have some very large specimens taken 



