ÖFVEKSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1900, NtO 2. 143 



The mean temperature varies from 20.3 to 27.5 and the 

 mean salinity between 34.72 and 36.94. Most' of these species 

 occur in the southern hemisphere and reach as a rule to 40^ — 50° 

 N. They proceed only rarely beyond that limit, but Oithona 

 plumifera makes an exception. 



Most of these species occur in the Mediterranean and the 

 Pacific, several also in the Indian Ocean. The principal areas 

 of distribution are between Africa and South America, between 

 the Azores and the Caribbean Sea, the Antilles and Florida 

 currents. 



The following list comprises rare species of the tropical or 

 temperate Atlantic, which may belong either to the styli- or the 

 desmo-planJcton. 



Copilia denticulata . . 



C. quadrata 



Coryceeus elongatus . . 



C. flaccus 



C. venustns 



Labidocera acutifrons . 



L. Nerei 



Leuckartia flavicornis . 

 Lubbockia squillimana . 

 Sapphirina sinuicauda . 



Mean 

 tempe- 

 rature. 



Mean sa- 

 linity. 



Northern and 

 southern limit. 



Distribu- 

 tion in the 

 Atlantic. 



Distri- 

 bution 

 outside 

 the At- 

 lantic. 



18.3 

 22.4 

 18.6 

 15.0 

 20.6 

 22.3 

 24.9 

 19.4 

 19.4 

 19.6 



35.90 

 36.04 

 36.68 

 36.01 

 35.25 

 35.20 

 35.25 

 36.12 

 36.85 

 35.40 



38° N. 



31° N. 

 20' S.— 38° N. 



40° N. 



30° S.— 42° N. 



23° S.— 18° N. 



2° 44° N. 



28°— 45° N. 



12° S.— 29° N. 



28° N. 



E. 



w. 



E. 

 E. 



E.W. 



E. 



E. 

 E.W. 

 E.C. 



E. 



M. 

 M.P. 



M. 

 M.P. 

 M.P. 

 M.P. 



M.P. 



M.P. 



P. 



The following list comprises species, which belong to the 

 coast-regions of the tropical or temperate Atlantic, or may be 

 classified as tropical or southern neritic species. 



Acartia bifilosa .... 



A. tonsa 



Euterpe acutifrons . . . 



Monops brevis 



Oithona brevicornis . . . 



I Sapphirina nigromaculata 



Temora stylifera .... 



T. turbinata 



Mean 

 tempera- 

 ture. 



1.8-26.2 

 26.6 

 19.4 

 22.0 

 26.2 

 23.9 

 22.6 

 21.0 



Mean sali- 

 nity. 



4—30.34 

 31.82 

 20.29—36.52 

 33.81 

 20.29 

 33.52 

 34.93 

 20.29 



Northern and 

 southern limit. 



6° S.— 63° N. 



7° N. 



40° S.— 51° N. 



24° S. 



6° S. 



6° S.— 49° N. 



37° S.— 42° N. 



6° S.— 18° N. 



Distri- 



Distri- 



bution 



bution 



in the 



outside 



Atlan- 



the At- 



tic. 



lantic. 



E. 



B. 



W. 



P. 



E.W. 



M. 



W. 



I. 



E. 



P. 



E.W. 



M.P. 



E.W. 



M. 



E. 



P. 



