P. T. CLEVE, PLANKTON COLLECTED BY MR. THORILD WULLF. 333 



The plankton belonged chiefly to the desmo-type and the almost 

 total absence of diatoms is remarkable. The sample from 

 16 N. 42°E. contained Doliohtm sp. abnndantly. 



7. Red Sea 1903. 



D a t e. 



Lat. N. 



Long. E. Teinp.j Sal. Pn. qt. 



Pn. ql. J NS. 



I 18 14° 8' 



»18 15°25' 



»19 17° 6' 



19 18' 2' 



20 I 19°54' 



»21 [ 22°15' 



22 24°56' 



23 

 23 



27°33' 

 28°24' 



42°42' 

 41°50' 

 40°50' 

 39°54' 

 39° V 

 37°30' 

 35°56' 

 34° 8' 

 33° 8' 



D 



Cp D 

 CpD | 



Cp 

 Cp Pr D 



Cp 



Cp 



Cp 



Cp 



8 

 38 

 27 

 26 

 46 



7 



15 

 17 

 12 



The temperatnre increased and the salinity diminished 

 from north to sonth. The northern part of the Red Sea was 

 poor in plankton, the sonthern part rich. The principal mäss 

 of the plankton belonged to desmo-plankton. The diatoms are 

 represented chiefly by Hemidiscus ameiformis, which formed 

 in the most sonthern sample the principal mäss and gave the 

 living sample a very bad smell. 



8. Gulf of Aden and Arabian Sea 1902. 



D a t e. 



Lat. N. iLone. E. 



NS. 



X 20 I 12°22' 



20 12^47' 



21 13°11' 



»21 13 Q 32' 



»22 13°59' 



.22 ; 14°22' 



»23 14°50' 



»23 15°12' 



.24 15°30' 



»24 15 52' 



»25 16 ? 20' 



»25 16°44' 



44°59' 

 46°47 / 

 48°31' 

 50° 4' 

 51°52' 

 53°33' 

 55° 9' 

 56°49' 

 58° 3' 

 59°39' 

 61°15' 

 62°54' 



Cp Pr 

 Cp Pr 

 Cp Pr 

 Cp Pr 



Cp 



Cp 

 Cp Pr 

 Cp Pr D 

 Cp Pr 

 Cp Pr 

 Cp Pr 

 Pr D 



24 



27 

 41 

 34 

 20 

 49 

 56 

 35 

 31 

 38 

 23 

 17 



