332 



ARKIV FÖR ZOOLOGI. BAND 1. 



scarce in the eastern parts of tlie Mediterranean, but fairly 

 rich in the western parts. The plankton in the eastern Medi- 

 terranean belonged to desmo- and styliplanhton. In the western 

 Mediterranean there occurred chiefly styliplanhton, bnt with 

 a certain amoiint of desmoplankton. There ociirred, besides, 

 some didy mus -plankton and some remarkable boreal forms, as 

 Thalassiothrix longissima, Peridinium ovatum and Calanus fin- 

 marchicus. 



The low temperature and high salinity are remarkable. 

 The plankton contained chiefly Oithona nana and Ceratium 

 furca, besides some larval stages of Acartia etc. 



6. Bed Sea 1902. 



D a t e. 



Lat. N. Long. E. Temp. Sal. 



X14 



» 14 

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 17 

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29 D 45' 

 28° 1' 

 26°35' 

 25 c V 

 23 c 30' 

 21°57' 

 20°25' 

 18°51' 

 17°11' 

 15°43' 

 14°18' 

 12°43' 



32 3 32' 

 33 c 31' 

 34°52' 

 35°54' 

 36°46' 

 37°41' 

 38°33' 

 39°30' 

 40'34' 

 41°37' 

 42°33' 

 43°18' 



25,2 



26,2 

 26,5 

 28,2 

 29,2 

 30,3 

 30,7 

 31,4 



31,3 



29,6 

 30,5 

 29,6 



42,81 

 40,70 

 40,59 

 40,32 

 39,92 

 39,40 

 39,16 

 39,04 

 39,04 



37,47 



37,70 

 36,80 



The temperature increased, as could be expected, sonth- 

 wards, bnt the salinity decreased. The Gnlf of Suez contained, 

 in spite of the high salinity, a rich plankton, but else the 

 plankton increased steadily from the north to the south. 



