— i5 — 



I have seen spécimens (in the Copenhagen Muséum) from the 

 Red Sea, from various localities in the lndian Océan and from 

 several places situated along south-eastern Asia from the Gulf 

 of Siam to the southern end of Japan and hear the Philippine 

 Islands. 



Remarks. — Figs. i and 2 — representing an antennula 

 from above and from the side — on Pl. xn in the Challenger 

 Report seem to have been drawn from a spécimen of this spe- 

 cies. The adornment of the antennula in the figures on Pl. xi 

 has not been drawn sufficiently correct; for this reason it can 

 not be decided to which species each of the spécimens figured 

 really belongs; judging from the size of the animal I a m apt to 

 think that figs. 1, 2 and 5 on Pl. xi represent a spécimen of 

 E. recurva, though the leaflet is not correct. 



Euphausia brevis, n. sp. 



Description. — The front part of the carapace is more pro- 

 duced than in any of the three preceding species; it constitutes 

 a triangle with the anterior angle measuring less than 90 0 , and 

 it covers a portion, at the most about half, ofthe eye-stalks. The 

 rostrum is either obsolète or very short, narrow. The latéral 

 denticles on the carapace, especially those of first pair, are 

 smaller than in the three preceding species. The eyes are also 

 a little smaller than in those forms. 



The leaflet on first antennular joint is directed upwards and 

 only slightly forwards ; it is proportionally broad and short 

 with the upper margin less or more concave, the distal latéral 

 angles acute or produced into very short setiform processes; 

 frequently this concave distal margin shows a small angle some- 

 times produced as a short setiform denticle. Second antennular 

 joint has the upper inner angle obtuse, whiie the outer upper 

 angle is thickened and adorned with a fine spiniform process 

 directed much forwards; this spine is rather large or small but 

 always conspicuous, either nearly straight or frequently dis- 

 pnctly curved. — Length of adult spécimens 9-1 o mm . 



Localities. — Stat. 171 5, i5 spécimens; stat. iy36, 11 spé- 

 cimens; stat. 1749, 17 spécimens; stat. 1760, 21 spécimens; 



(42) 



