]39 



Öfversigt af Kongl. Vetenskaps-AkademieDS Förhandlingar 1900. N:o 2. 



Stockholm. 



Geographica! distribution of Atlantic Copepoda and 

 their physical conditions. 



By P. T. Cleve. 



(Communicated February 14, 1900.) 



In the following article I have arranged the Atlantic cope- 

 poda, which I noted in the years 1898 — 1899, according to their 

 occurrence in ray planktontypes and have calculated for each 

 species the mean temperature and the mean salinity. I have 

 also noted the extreme limits north and south, known by my 

 own and other observations, and the distribution in the eastern, 

 central or western Atlantic, as well as ontside the Atlantic. 



The letters E., C, W. indicate the distribution in the eastern, 

 central and western Atlantic, but E includes in several cases the 

 distribution across the Atlantic north of 40' N., because many 

 species of essentially eastern distribution go from the north of the 

 Azores across the Atlantic towards the region of New York. 



When in the Tables the figures are enclosed in parentheses, 

 this denotes exceptional cases or occurrence in other regions 

 than the Atlantic, for instance in the Baltic. 



The letters M., P., I,, R., B. indicate the occurrence in the 

 Mediterranean, Pacific, Indian Ocean, Red Sea and Baltic. 



The following list comprises species which belong to tricho- 

 plankton, or arctic forms. 



