iVM) DIATOMACK.K — l-EF^AG ALLOA, KHl/OSOLK.MA 



Temperature: S,s, mean of 2() obs., max. 21. i, min 1 .;> 

 Salinity: r>^).u. mean of 2() obs., max. H().2.s, min. Bo.os. 

 Planlcton-type. 'I'his principal area of distribution is between 

 Scotland, Iceland and Greenland, wbich to,uether with the mean sali- 

 nity seems to prove that it belongs to the Cha-topUinkton. The var. 

 .V. frandiilrnta is noted from the Mediterranean. — ('. 



PERAGALLOA MERIDIANA Sc.ni ft. 



(Van IIeukck: A Treatise on tlie Diafoniacea' pag. 411*. — PcrinjaUid irojiico 

 SchCtt Engl. & Prantl. 1). nat. Pflanzunfamilien I, 1. b; pa?. 86. 



18<)8 FvUrunrif. 12' N. 1\ \\ . 

 October] 21- S. ?->{? W. 



Temperature: 27 to 22. 

 Salinity: HT.im (one obs.). 

 Plankton-type: 1) or A7. 



Rcinarl,-. .Sc.hltt does not say anything al)Out the habitat of 

 tiiis form, but Van Hecrck indicates the IJaltic, wliich must be erro- 

 neous. It seems to me questionable whether this form not be an 

 anomalous (7i(i'(ncr/-()s iwriiridinis. 



RHIZOSOLENIA (TEMPEREI VAR.) ACUMINATA Peragallo. 



CLe Diatom iste 1892 PI. XV iig. 4.,; 



1898 Jaimarii: 1' N. 53^ \V. 

 Fchrnary: b S. 9' E. 

 Octobrr: Azores. 



Novcmbei': Rio Janeiro; Azores. 

 December: Azores. 



1899 June: 14= S. 6° W. 



Temperature: 23.(;, mean of 7 obs., max. 29.:!, min. 17.2. 



Salinity: '^b.\:\, mean of 4 obs., max. 36. cs, min. 33. si. 



Plankton-type. This form, which is noted also from the Me- 

 diterranean and the Pacific, occurs along the coasts of the tropical 

 Atlantic, east and west. — A7. 



