872 P. T. CLEVE, ON THE ORIGIN OF »GULF-STREAM WATER». 



of SO wide a ränge it has been very rarely seen in the Sargasso 

 Sea, round which the styli-plankton water occurs. 



In March — May the styli-plankton extends along 50° N. 

 from America to the English Channel. Already in April this area 

 has advanced to 60° N., in June to Iceland. From that Island 

 it spreads on the east to the Shetlands, on the west to Green- 

 land, where rare specimens follow the east Greenland current 

 and are conveyed in October into Davis Strait. Other speci- 

 mens follow the current to the north of Icelaud in September, 

 others drift to Spitzbergen, where they already appear in 

 August. 



