Remarks. — This species is easily distinguished from ail other 

 forms by the adornment of the antennular leaflet. Claus estab- 

 lished E. Miïlleri on spécimens from Messina; he writes that 

 its basai antennular joint « neben einem mit Borsten dicht 

 besetzten Hocker einen geweihartigen Auswuchs entsendet », 

 and this latter part ofthe sentence is well-chosen because the 

 leaflet in reality reminds of a branch of Cervus Alces. — • Thysa- 

 nopoda bidentata, G. O. Sars, is the same species; Sars has 

 given a good description and very characteristic figures of his 

 spécimen; it may only be noted that the denticles of the leaflet 

 — certainly accidentally — had been recurved in a way never 

 seen by me. It is easily seen that figs. i , 2 and 5 on Pl. xi in the 

 Challenger Report do not represent animais belonging to 

 E. Mulleri; on thèse and some other figures on Pl. xi and xn 

 in that work I refer to my « Remarks » on E. mutica. 



It is an interesting fact that many of the spécimens from the 

 Mediterranean are conspicuously larger than my individuals 

 from the Atlantic, a single spécimen excepted. 



Euphausia recurva, n. sp. 



Description. — The rostrum is generally about as long as 

 the eye-stalks, thus frequently a little shorter than in£\ Miïlleri, 

 while the front part of carapace is short as in that species, cover- 

 ing at most the base of the eye-stalks. The leaflet on first 

 antennular joint is in the adult maie long or very long, oblong 

 triangular with the end less or more setiform, much recurved, 

 frequently reaching nearly the inner side of the eyes. In the 

 female this leaflet is vertical or a little recurved, moderately 

 broad with the latéral margins parallel, while the distal margin 

 is deeply and less or more obliquely concave; the distal part of 

 the leaflet is therefore shaped as two triangular acute lobes 

 either nearly equal in length or the inner somewhat or conside- 

 rably longer than the outer. In both sexes second antennular 

 joint has on the upper outer angle a subconical scarcely acute 

 tubercle, while the upper inner angle has a slender, spiniform, 

 acute process directed much forwards and somewhat or much 

 longer than the tubercle mentioned. — Length of the largest 



(42) 



