"262 DIXUFLAGELLAT^ — PERIDIMIJM 



Aiy N. f)7= W.; i;V N. (U° W.; 48^ N. U \V ; S. of It-e- 



land to the Fiiroes and 60° N. 4° W. 

 1S1)*.> '/(i/iiia/'i/ : otT (iibraltar; Claiiaries. 

 Febrnanj: 32^ N. 46^ W. 

 Ma/'ch : x\zores. 



Api'il: 42°— 44^ N. 18=— In^ W. 

 Jiuw: ;r— 15= S. 17°— 5° W. 

 .//^///; 11 N. 26° W. to 23= N. 36° W.; area between 38°— 



40^ X. 39—38^ W. and 45° N. 'dV W. 

 Si'pti'mhcr: 56' N. 33^ W. 

 Orrolx'i-: 56 N. 38 W. 



Temperature: 2().s, mean of iW) ol)s., max. 27..!, min. 8,j. 



Salinity: 35.. -.3, mean of 50 obs., max. 38. .-,1, min. 33..sn. 



Plankton-type. I have found this specie.s in samples from 

 the lied Sea. It enters the Atlantic W. of S. Africa, occurs rarely 

 in tiie Brazil current, in the s[)rinti- N. of S. America, in the Carib- 

 bean Sea and Ihe l-'lorida Current, but is less abundant in the 

 western than in (he eastern Atlantic, where it spreads from the Cape 

 Verde Islands towards the Azores. In May — July it occurred be- 

 tween 10" and 50 N., extended in .Inly to 60 N., in August to lee- 

 land and in September to E. (ircenland. It has been seen only 

 rarely in the northern and southern parts of the Sargasso Sea — .S. 



PERIDINIUM HINDMARCHII Mlrr. c^ Wiiitt.^ 



rr laiis Linn. yoc. London 2;nd. Ser. Bot. Vol. \' pait. 9 PI. XXLX fig. l.i 



1897 Dccciubcr: 2<) N. 36" W., very rare; 24" N. 50^— 5r W 



Caribbean Sea. 



1898 March: 34"— 39' N. 39—32 W.; Caribbean Sea. 

 Ap/-i/: 22'— nr N. 47—60' \\\; 19— J6 N. 50—56" \\'. 



Temperature: 23. 1, mean of 12 obs., max. 27.2, min. 15.,;. 

 Plankton-type: 1). 



' Aliirrav's «S: Wliittino's data used. 



