DlATOMACE..li — GII.KTOCKROS 308 



Temperature: 15. i, mean of 17 obs., max. 2().i, niin. 10.8. 

 Salinity: 35.86, mean of 11 obs., max. SO.sr., min. .35. u. 

 Plankton-type. C neapoUfiu/its Schroher represents this form, 

 which thus occurs also in the Mediterranean. — ,S'. 



CH^TOCEROS FEMUR .SchOtt. 



(Ber. d. Deutschen Bot. Gesells. 1895 Vol. XIII pag. 45). 



181)7 December: \2' N. 50^ W., very rare. 

 1898 Jarii/n/'i/: 7" X. 53- W., rare. 



Temperature: 2(1. , to 26..-,. 

 Plankton-type: I J. (or AY). 



CHETOCEROS FURCA Cl. 



'A Treatise mi the Phyto-plankton PI. I fig. 10). 



1S!W Jariuan/: fr— 7^ X. 55'— 53' W. 



Fehriiary: 15- X. 71" W. 



Marelr. 28° X. 38' W.; 3(r N. 2i)^ W. to 41° X. 21°— 23= W.; 

 41° N. 56= W to 43-' N. 1-8 W. 



April: 19^ X. 22= W. 



Mail: 41° X. 51° W. 



Dereinlier: 18" X. 1)7=' W. 

 1899 Mar eh: Azores. 



Mai/: 85- X. 75" W. 



Temperature: 18. i, mean of Hi obs., max. 27, min. 11. 



Salinity: 35.78, mean of 10 obs., max. 36.io, min. 34.88. 



Plankton-type. This species occurs in the region round the 

 Sargasso Sea and belongs to the tropical or subtropical Styli-plankton. 

 It has not been seen beyond 50° X. Found in the Indian Ocean, 

 the Mediterianean and the Red Sea. — N. 



