DIATOMACE^E — CHyETOCEROS 318 



July in the Sargasso Sea and the Florida Current, advanced in 

 August beyond 40° N. and appeared round the Azores from August 

 to the end of the year. Schrodeh mentions it from Naples. — I). 



CH^TOCEROS VOLANS Sghitt. 



{C. cuvrew-i Ct.. Fifteenth annual report of the Fishery Board for Scotland, for 



1896, pag. 298, fig. 8.) 



1897 December 



1898 January: m N. 18" W.; 41° N. 22° W. to -13° N. 18° W.; 



46° N. 11° W.; 4-~ S. 29 W.; 2.5° N. 74° W. 

 Febnutry: 16° N. 71° W. 

 Marvlr. area between 36° N. 29° W., 48° N. 6° W., 49° N. 



33° W. and 43° N. 50° W.; 64° N. 25° W.; 9° N. 59° W. 

 April: area between 89^ N. 24° W., 41° N. 19° W., 50° N. 



9° W. and 48° N. 29° W. 

 May: 45° N. 43° W.; 41° N. 51° W. 

 June: Azores; 44° N. 9° W.; 10° N. 58" W. 

 July: 62° JST. 0°— 4" W.; 77" N. 7° E. (abundant); 40°— 41° N. 



69°— 58° W. 

 August: Azores; 77° N. 8"— 12" E. (very common); 17° N. 71° 



W.; 40°— 41° N. 66°— 62° W. 

 September: 59° xN. 2° W.; 66° N. 18° W. (rare). 

 October: Azores; 57° N. 18" W. (rare). 

 November: 48° N. 29" W.; 55° N. 21° W. (rare). 

 December: 41° N. 66° W.; 47° N. 45° W.' (rare). 



1899 September: 65° N. 3° W. (very common); 65° N. 2" W. (rare). 

 Xovember: 51° N. 13° W., rare. 



Temperature: 14. i, mean of 52 obs., max. 27. v, min. 5.34. 



Salinity: 35.09, mean of 41 obs., max. 36. is, min. 31,84. 



Plankton-type. This form, which perhaps is a variety of ('. 

 peruvianus, occurred in the spring, M-arch and April, on the wide 

 area between the Azores, the Engl. Channel, and the Newfoundland 

 Banks and also south of Iceland, in July in the Faroe Channel, in 

 July and August abundantly at Spitzbergen; later it was seen only 

 rarely. — S. 



