COPEPODA 171 



measurements of the terminal segments of the antennulae are like those of E. norvegica though less 

 marked ; the articular membrane between Re I — II of pes I is not completely lost 



The fifth pair of legs in the male shows minute differences, as realised by comparing figures 

 (text-fig. 47 k). 



Yo (St. IV). Size of specimen from Thor St. 154 was 5-02 mm.; anterior division (2'3 + i'43) ^ 373; 

 urosomn 1-29 mm. 



This stage differs from the corresponding stage of E. norvegica by the more rounded lateral 

 corner of the thorax. The appendages show differences similar to those of E. 7iorvegica (text-figs 47 1 — n). 



Occurrence. The Ingolf Expedition has taken the species at three stations only, viz: 



2% 1896 St. 94 64°56 L. N. 36°i9 L. W. P. 100— o Temp, at surface 2-5° C. 4? (V), i yc? (V), i y d* (IV). 

 ^5/^ 1896 St. 121 66°59 L. N. i3°ii L. W. V.' loo-o — 4-8° C. i f?, 4y? (V), 2 yd" (V) i y (HI). 



27/^ 1896 St. 117 69=13 L. N. 8°23 L. W. V.2 loo-o - 4-1° C. i y (V). 



The Danish East Greenland Expedition 1900 has taken it at three stations. 



4/7 3 p. m. 73°32 L. N. 3=30 L. W. 300—0 meters i f? (with sperm.), i y? (V), i y? (IV). 

 8/7 2 p. m. 74°09 L. N. ii°3i L. W. 400-0 - i f?, 3 y? (V), i yS (V). 

 '% 6 p. m. 74°28 L. N. i5°36 L. W. 400-0 — i fc?, 2 y? (V), 3 yc? (V), i y? (IV), i y<? (IV). 



The S/S Thor has taken the species at 8 stations. 



2% 04 St. 153 65°20 Iv. N. 27°i2-5 L. W. Yt. 800 M. Wire i y? (V), 6 yc? (V). 



"/e 04 St. 154 65°27 E. N. 27°io L. W. Yt. ? 16 f? (2 with sperm.), 2 y? (V), 2 yd* (V), 2 y? 



(IV), 4yc? (IV). 



Yt. 800 M. Wire 12 f?, 2 f c?, 4 >'? (V), 4 Yc? (V). 



"/; 04 St. 210 66°43 L- N. i8°io L. W. Yt. 400 M. Wire i f?, 3 y? (V), i y? (IV). 



"/; 04 St. 214 67°i9 L. N. i7°55 L. W. Yt. 800 M. Wire 19 f? (3 with egg-balls), 3 fc?, i yd" (V), i yc? (IV). 



5/5 04 St. 63 64°o5 L.N. 9°38 L. W. Yt. 300 M.Wire 8 f ?, 6 y? (V), 6 yc? (V). 



4/8 04 St. 230 63°ioL. N. 7°3i L.W. 2 f ?. 



9/5 04 St. 70 63°33 L. N. 6°20 L. W. Yt. 100 M. Wire 27 f? (2 with sperm.), 5 f J", 5 7? (V), 3 Yc? (V), 



3y? (IV), iy<? (IV). 



^3/^05 St. 124 6i°04L. N. 4=^33 L.W. Yt. 1000 M. Wire if?. 



Distribution. The species is very common in the Polar basin crossed by Nan sen, "from 300 

 metres to the very surface of the sea". By the Due d' Orleans it was taken at 15 stations in the sea 

 between Spitzbergen and Greenland between 79=56 L. N. 1=29 L. E. and 7i°22 L. N. i8°58 L.W. ("/7— 's/g 

 1905). Adult males and females partly with eggs and spermatophores were found at 5 stations between 

 200 and 500 metres; the young specimens were sometimes found in higher layers, but scarcely at the 

 surface ; in the lower layers between 500-1000 metres young ones only have been found. In the Norwegian 

 Sea it has, according to Sars, been taken a few times between 200-1000 metres. Damas & Koefoed 

 write (p. 408) without mentioning the source: "Dans la mer de Norvege: jamais a la surface; princip- 

 alement au dela de 600 metres". According to Wolfenden (1904, p. 133) "it is of rare occurrence in 



