COPEPODA — CALANUS ' 47 



November: 51° N. 13° W., rare; 53° N. 43° W. (rare) to 48° N. 

 46° W. (common) and 47° N. 51° W., (rare). 



Temperature: 7.8, mean of 50 obs., max. 22, min. O.s. (Only 

 such samples considered as contained this species abundantly). 



Solinity: 34.3o, mean of 50 obs., max. 35.4*, min. 32. 12. 



Plankton-type. This species has a very wide range of distri- 

 bution, according to the compilation of Aurivillius (Kongl. Vetensk.- 

 Akad. Handl. Vol. XXX n. 3 pag. 69) in the northern Pacific, off 

 Japan and along the coast of Asia to N. China, in the southern 

 Pacific, 37°— 38° S. 133°— 149° E. and along (he west coast of 

 South America; in the Indian Ocean, at 35° S. 45° E. In the 

 Atlantic it has been seen in the northern hemisphere as far 

 south as the Canaries. It is besides found in the Mediterranean. 

 It was collected by Nansen in the Polar Basin between 78° N. 

 136° E., 85° N. 79° E. and 84° N. 11° E. According to the above 

 statements this species is a characteristic inhabitant of the artic 

 regions, along the coast-banks of Greenland, Iceland, North America 

 etc., from where it drifts by (untier-) currents across the Atlantic 

 to the coasts of Europe. In the winter the plankton of these cur- 

 rents comes to the surface. — T. 



CALANUS GRACILIS Dana. 

 1898 September: 32° N. 33° W., very rare. 



Temperature: 25 2. 

 Salinity: 36. 71. 



Plankton-type. Noted from the Gulf of Guinea, the Canaries,, 

 the Mediterranean and central Atlantic; also from Australia and the 

 Philippines. — D. 



CALANUS HYPERBOREUS Kroyer. 



1898 June: 71°— 72° N. 21°— 23° E. (Auriv.) 



July: 78° N. 1° E.— 3° W. (deep sea hauls, Auriv.) 

 August: 79° N. 10° E. (deep sea hau Auriv.) 

 September: 74° N. 19° E. (Auriv.) 



