ÖFVERSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1900, N:0 2. 141 



I consider the species of the foUowing list as belonging to 

 my plankton-type styliflanhton. 



Acartia Clausii . . . 



A. Danae 



Candace pectinata. . 



Centropages Chierchise 



G. typicus 



Claupocalanus arcui 

 cornis 



Corycseus rostratus . 



Euca]aiiu8 elongatns . 



Euchaeta spinosa . . 



Euchirella rostrata . 



MecvDocera Clausii . 



Mierosetella atlantica 



Oithona similis. . . 



Oncsea mediterranea . 



O. subtilis 



Paracalaaus parvus . 



Pleuromma abdominale 



P. gracile .... 



Rhinocalanus nasutus 



Mean 

 te m pe- 

 rature. 



Mean sa- 



linity. 



11.4 



35.20 



17.6 



35.97 



17.3 



36.06 



15.0 



35.84 



15.7 



34.24 



17.5 



35.89 



19.6 



35.98 



17.4 



36.54 



16.4 



35.82 



16.2 



35.93 



16.8 



35.77 



19.0 



35.50 



12.3 



35.00 



16.8 



36.42 



13.0 



35.66 



15.9 



34.88 



13.7 



35.17 



15.6 



35.69 



15.5 



35.61 



Northern and 

 Southern limit. 



38^—73° N. 

 34°— 49° N. 

 33°— 60° N. 

 38°— 48° N. 

 6° S.— 63° N. 



33° S.— 55° N. 

 33° S.— 48° N. 



36°— 60° N. 



42°— 46° N. 



32°— 44° N. 

 30° S.— 50° N. 

 31° S.— 79° N. 

 33° S.— 81° N. 

 33°— 42° (80°) N. 

 32° S.— 47° N. 

 32° S.— 61° N. 



16°— 50° N. 



33°— 50° N. 



21°— 60° N. 





Distri- 



Distribu- 



bution 



tion in the 



outside 



Atlantic. 



the At- 





lantic. 



E. 



M. 



E. 



P. 



E. 



M. 



E. 





E. 



M. 



E. 



M.P. 



E. 



M. 



E. 



M.P. 



EC?) 



M. 



E. 



M. 



E.(C.W.) 



M.P. 



E.(C.W.) 



M.P. 



E. 



M. 



E.(C.) 



M.P. 



E. 



M. 



E.W. 



M.P.I. 



E. 



M.P. I. 



E. 



M.P.I. 



E. 



M.P. 



It will be seen that the mean temperature varies between 11.4 

 and 19.6. The salinity varies from 34.24 to 36.54. The species of 

 the group reach in raany cases from the latitude of Rio Janeiro 

 or Cape of Good Hope to about 60° N., or to the Färöe Channel, 

 but several go far niore to the north, as is the case with Acar- 

 tia Clausii, Mierosetella atlantica and Oithona similis, which 

 reach Spitzbergen. Onccea mediterranea has been noted by Th. 

 Scott at Franz Josef Land. Most species have their principal 

 area of distribution on the northern hemisphere in the eastern 

 Atlantic. Almost all inhabit the Mediterranean and some also 

 the Pacific and Indian. 



