32 



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. (2"9 + o-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 — o-6) mm., the stage II, which varies from i-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 hyperboreus have been taken all over the area investigated 

 by the different expeditions as far south as 5i°oo E. N. n°43 E. W., the S/S Thor has J 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 /6— l8 / 7 95 in 10 samples in the depth of 200 — o 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: 



Stages. 



Number of 



samples in 



which each 



stage is 



found. 



Number of 



specimens 



examined in 



10 samples. 



Date 

 1895. 



<4H 

 )— 1 



L. N. 



L.W. 



Depth in 

 fathoms. 



Temp. 



at 

 surface. 



Percentage of 

 stages. 



Number of 

 specimens 

 examined. 





VI 



V 



IV 



VI 

 V 

 IV 

 III 



4 

 8 



9 

 3 



6 



200 



30 



10 



2 5/695 

 22 /695 



St. 24 



St. 22 



63°o6 

 58°io 



56°oo 



4 8°2 5 



V. 1 200—0 

 V. 1 200—0 



4-2° C. 

 5-4° C. 



1 

 5 



96 



88 



3 

 7 



105 

 65 



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

 Eundbeck has from J 9/ 5 1889. 58°2i E. N. 48^3 L. W. 1 f?. 



from 2 3/ 5 1889. 59°i2 E. N. 52^5 E. W. 3 f?, 3 V. 

 26 / 5 1890. 57°o8 E. N. 49°o4 L. W. 10 f£, 10 V 

 Soren Hansen l8 / 7 1885. 59^4 E. N. 5i°i8 E. W. 4 V, 10 IV. 



Eberlein * 2 / 7 1882. Umauakfjord. 1 f£ 4 (V), 1 IV 



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

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

 4 samples of which 3 contained together 6 f<j>, 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, 4/ 5 r8 95 1 f? and 2 V 5 1895 3 V + 3 IV 



The Thor has from l8_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 67°27 E N. 27°io E. W. the percentage of 

 196 specimens examined was f<j> 67 %, V 30 % and IV 3 %. 



