DIX0FLAGELLA.T.1'. — OXYTOXUM 200 



Si'pti'iiihcr: 47° N. 9- W 

 1899 April: 41° N. 11" W. to -I(i" N. 13° W. 

 June: 20° S. 1° E. to 14° S. 6° W. 

 July: 15° x\. 29° W.; 43° N. 35- W.; 18° N. 23^ W. 

 Xoccinbcr: 51° N. 34° \V. 



Temperature: 18.?, mean of 31 obs., max. 26. i, min. lO.s. 



Salinity: 35.69, mean of 26 obs., max. 36.68, min. 32.96. 



Plankton-type. This species occurs in the Mediterranean, Pa- 

 cific and Indian Ocean. To judge from my own obstervations, it is 

 a typical Styli-plankton-form, but Murray 8 and Whitting's data 

 point more to the conclusion that it belongs to the Desmo-piankton. 

 It occurs in the Atlantic at least from 20" S., but scarcely passes 

 beyond 50° N. — N. (1). ?.) 



OXYTOXUM TESSELATUM (Sxiiix).' 

 (Schltt: D. Peridineen d. Plankton-exp. PI. XVII fig. 52.) 



1897 SrpU'inh,'/': 30' N. 39' W. 

 October: 28^—31° N. 45°— 42- W. 

 Xovriiihcr: -IV N. 45° W. 



Deer I liber: 15-— l(r N. 78'— 77' \V. 



1898 January: 38° N. 25° W. to 32° N. 34' W. 



February: 27'— 25' N. 41°— 44° \V. and 21°— 19- N. 50-- 



52° W. 

 Mareh: 29°— 31° X. 45'-42° W. and 34'— 39' N. 39'— 32^ W. 

 Aiifiust: 49- N. 20° W, 



1899 March: 46° N. 11° W. 

 July: 48° N. 25° W. 



Temperature: Ib.-o to 27.2o (exceptionally 12). 



Salinity: 35.1? to 35. 71. 



Plankton-type. Occurs in the Mediterranean and Indian Ocean. 



Murray's & Whitting's data used. 



