oiO 1)1AToma(.;k/K — khiz(iso[,ema 



Mai-vli: 12" N. 01° W.; 15" N. 19 W; :'>6^ N. :-5f/" W.; i;i°— 



45 N. 41 — •!() W. 

 Man: 20—2:!-' N. 60-'--5(r^ A\'. 

 ./«//r; 24=^ N. 58- W. 

 August — September: Azores. 

 Oetolie/-: 21° S. 3()" W.; Azores. 

 Xnceiiihcr: area between Rio Janeiro, 19" .S. HP W. and 24^ 



S. 29^ W.; Azores; 44° N. 55° \V. 

 Deeeiiilier: 29" S. 49° W.; Azores. 

 1899 January: 45" N. 49- W 

 February: 31" N. 40" W. 



Temperature: 20.i, mean of 33 obs., max. 27. i, min. s. 



Salinity: 35.8?, mean of 17 obs., max. 37.26, min. 32. ht. 



Plankton-type. This species occurs in the Mediterranean and 

 belongs to the tropical Atlantic, east of South America, and follows 

 the North Equatorial current into the Caribbean Sea, the Florida 

 Current to Newfoundland Banks and the Azores. It occurs also in the 

 Sargasso Sea. — 1). 



RHIZOSOLENIA (ALATA VAR.) CORPULENTA Cl.' 



(A, Treatise on the Phyto-plankton PI. 11 fig. 11 1. 



1898 February: 5" S. 8" E. 



Mardr. T N. 35° W.; 43" N. 48" "W. to 45" N. 3(5 W. 



Apr it: 47" N. 39° W. to 49° N. 22- W 



May: 49° N. 23° W.; 43" N. 45^ W". to 41° N, 1)3- \T. 



June: 10° N. 53° W.; 45° N. 41° W. 



August: 63° N. 25" W., very rare. 



September: 64" N. 32" W ; 41° N. 65 W 



October: 63" N. 16" W., rare; 57" N. 27" W. to 59 N. 16" 



W., common at 16" — 21" \V. 

 Xoreuiber: 63" N. 13° W ; 56° N. 30° \V,; 13" N. 61° W. to 



47° N. 41° W. 

 December: 62° N. 10' W. 



Ostenfeld's data used. 



