JJ1AT0MAE.K — RIIIZOSOLEXIA 339 



RHIZOSOLENIA BERGONII H. Per. 



(Le Diatomiste 1892 PI. XV fig. 5). 



1898 Xorrmber: 24"' S. 29° W. 

 189U March: 47° N. 8° W. 



Tempepature: ll.s to 22. d. 



Salinity: 35.73 to 36.69. 



Plankton-type. Noted from the Mediterranean. — D. [S?) 



RHIZOSALENIA CALCAR AVIS Schulze. 



(H. Peragallo: Le Diatomiste 1892 PI. XVI fig. 9). 



1898 Jnmiary: T N. .53- W.; 3.5" N. 71" W. 

 Februai^y: 5° S. 4" E.; 13° N. 70° W. 

 Mavfh: T S. 55° W.; 28" N. 74° W. 

 April: 1° N. 55° W. 

 June: 10° N. 5.3° W. 



Xorcniher: 1-8" N. 11° W.; 42" N. fil" W. to 40^ N. 67 W. 

 Drnniihr: 18"' N. 67° W.; 41° N. 66° W.; 18°, N. 67° W. 



Temperature: 19.^, mean of 15 obs., max. 28, min. 10. 



Salinity: 34.7?, mean of 7 obs., max. 36.oi, min. 33.ii. 



Plankton-type. This species is te be considered as a neritic 

 form of the tropical and subtropical Atlantic, which however spreads 

 along the European coast into the E. Channel, the southern part 

 of the North Sea and the Skagerak. Occurs in the Mediterranean. 

 — Xni (Kt). 



RHIZOSOLENIA CASTRACANEI Peragallo. 

 Le Diatomiste 1892 PI. XIV fig. 4). 



1897 Ih'ccniher: and. 



1898 January: 24° N, 1-0" W. 32° N. 3.3° W. 36° N. 27" W.; 35- 



N. 7i-° W. 

 Fchrnary. 48° N. i-O" W.; 16 N. 71° W. to 34" N. 74° \V. 



