COPEPODA 



Y. (St. V). Size. 6 -- 6-8 mm. (4-5 + 1-3). 



This stage shows the same differences from the mature females as in Cal. finmarchicus G., 

 it differs from that species, as in the adult females, by a pointed lateral corner, fewer teeth in the basipod. II 

 pes V marginally, by larger size and greater transparency. 



Y. (St. IV I). Size, of St. IV 37 mm. (3-9 + 0-8) 4-5. Difference from Cal. finmarchicus as in 

 preceding stage, but number of spines at inner margin of basipodite II pes V 2 3. The stage III, which 

 varies in size from 2 - 6 3 (2-4 0-6) mm., the stage II, which varies from 1-8 1-9 mm. and the 

 stage I, of which I have not examined any specimen, seem only to be distinguished from the corre- 

 sponding stages of Cal. finmarchicus by larger size, as the character found in the pointed lateral 

 corner is wanting. 



Occurrence. Specimens of Calanus hypcrborcus have been taken all over the area investigated 

 by the different expeditions as far south as 5ioo L. N. n43 L,. W., the S/S Thor has l s/ 6 05 taken 

 a single f?. (St. 82. Jt. 1200 M. W.) 



West Coast of Greenland. On the west coast of Greenland it has been found by the Ingolf 

 Expedition from 22 /e l8 /? 95 m IO samples in the depth of 2000 fathoms. The stage IV has been 

 found in the greatest number of samples, but the stage V in the largest numbers; of the adult 

 females and stage III only single specimens were found; the youngest Copepodites seem to be wanting: 



Bergendal has at Jakobshavn 2I / 8 1890 taken a single f.. 

 Lundbeck has from '9/ s 1889. 582i L,. N. 4843 L,. W. i f?. 



from 2 s/ 5 1889. 59i2 L. N. 52O5 L. W. 3 f?, 3 V. 



* 6 / 5 1890. 57o8 L. N. 4904 L. W. 10 f?, 10 V. 



Soren Hausen l8 /7 l88 5- 59 0l 4 L. N. 5ii8 L. W. 4 V, 10 IV. 



Eberlein / 7 l882 - Umanakfjord. i f?, 4 (V), i IV. 



Denmark Strait. The Ingolf Expedition has south-west of Denmark Strait (between 62 

 L,. N. and 58 L,. N. and between 40 L. W. and 26 L,. W.) I2 /6 1895 and from l6 /e 2 % 1896 taken 

 4 samples of which 3 contained together 6 f?, 3 respectively 12 V and 9 IV, and only 2 samples 

 containing 3 specimens of stage III. The same expedition has in the Denmark Strait 2b /6 1896 taken 5 

 f? and 25 V, Vs * 8 95 i f? and 2 '/ 5 i 8 95 3 V + 3 IV. 



The Thor has from I& ~ 2I /6 1904 in Denmark Strait in 6 of 7 samples collected 180 f. and 

 104 V, but in 4 of 7 samples only 10 IV. At St 154 2I /6 6727 L. N. 27 10 L,. W. the percentage of 

 196 specimens examined was f? 67 %, V 30 % and IV 3 %. 



