iiiATOMAi-.i. -inii/dsoLi MA ;{;-]t) 



RHIZOSOLENIA BERGONII II. I'km. 



il.c lli.-itoiiuste 1S92 I 'I. XV lig. 6";. 



1S<)8 Xori'iiihi-r: iM S. 21) W. 

 1S<HI M,irrh: \1 X. S \V. 



Temperature: 11..-, to 22. n. 



Salinity: '^^^.-.-.s to Hf).,;.... 



Plankton-type. N(»I<mI tiom Ihc Aleditcrraiicaii. - - I). [Sf) 



RHIZOSALENIA CALCAR AVIS Scm lzk. 



(H. l'i:ii\<..\i.i,o; l.c Diatoiuistc 1892 I 'I. XVl lig. 9). 



ISilS Janiuirj]: 7" N. 53' \Y.\ )\:r x\. IV \V. 

 Frhi-uary: 5° S. 4^ K.; 18° N. 7(P W. 

 March: T S. 5o^ W.; 2S^ N. 71-- W. 

 -l/*/-//; 7^ N. oiy" \\ . 

 Juiw. KT N. 53^ W. 



Xor,',i,l,cr: 18^ N. H W.; 42- N. fil^ VV. to iO i\. 67 W. 

 Ihu-rinlwr: IS N. ()7 W.; 11 N. 66- W.; 18^" N. 67' W. 



Temperature: 19.4, mean of lo obs., ma.\. 2s. inin. lo. 



Salinity: oi.::. mean of 7 ob.^.. max. lUi.t.i, miii. 8H.ii. 



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

 tuiiii of the tropical and subtropical Atlantic, which however spreads 

 aluno the Knro|)(^an coast info the K. Channel, the soiUliern part 

 of the North Sea and tiie Ska^crak ()(<iirs in the Mediterranean. 

 — .\'/// iXi). 



RHIZOSOLENIA CASTRACANEI I'in.\(;.\rj.n. 

 l-e Diatomisic IS'.lj |>|. \\\ \\^. 4;. 



1897 I)rcr/ii/ir/-: and. 



1898 Jftnimi-ii: 2i \. iO W. 82 .\. ?^?^ W . )MV .\. 27 W.; )\h- 



\. 7 1 W. 

 l-'rhriKirji: iS- N. iO W".: hi X. 71 W. N. M X. 7i W. 



