DIATOMAr.K.^', — lilTVI-lM, KTIl MnlUSi .LS ;i2r) 



DITYLUM BRIGHTWELLII Wkst. 



Van lliau.K h^vii. I'l. CXIV fig. 4- '.P. 



is<is March: l^:J N. 17 W.; IS N. (> W. 

 Aj,ri/: ri N. IT) W.; iS N. T) W. 

 Anfjiixi: .").") X. "> \V. 



.Ininuirjj : (I N. <)••• \V. 

 iSil'.l M((!l: ()<> N. i \V. 



Temperature: I <>.-.. mean of 7 obs., max. 17, niiii. (i. 



Salinity: ^Ji.so, mean af i ol)s.. max. ;>r)..!i, min. ili.n-,. 



Plankton-type, This s()i'(ies is very common in the Kni^rlish 

 Chaimel, the North Sea and tiie Skagerak. Its rare occurrence in 

 the Atlantic and tiie low salinity jirove that it is a neritic form. 

 Occurs in l'u!i;et's Sound. — Xnt. 



DITYLUM SOL. 



'/•/•/-•. SnI. \. Schmidts Atlas d. Diat. 1\. I'l. CI, II lig. i, 5. 7—9). 

 IS»IS Jinii': 10 X. :^)\ AV. 



Temperature: '-^7.l'. 

 Salinity: ;'.<'). oi. 



Plankton-type. Noted fiom the dulf <if l!cn<xaL lava, llnn.if- 

 knn<i-. — Xi. 



ETHMODISCUS SP. Castk. 

 (Clialleniior i'.xp. Diat. Pi. XIV li^^ 4). 



1897 Ihrrinhrr: )V1 N. H:5 W. 



1898 Fcbruarii: \)\ —\i\ N. 7(1- 71 \V. 

 Mar,h:'m N. ;}2^ W. 



Man: ;5<i N. 12" W. 

 Ocfohrr: -21 S. ;}() W. 



1899 Janiiari/: oo N. 19 \V. 

 Aju-il: 2S N. 7;") A\'. 



Temperature: 21. c, mean of 7 obs.. max. 27, min. 12. 

 Salinity: ;5t).io. mean of i obs., max. :^7.:.m, min. o.')..-,!. 

 Plankton-type. Tragments only liave been fdund of this 

 species, remarkable for its tine and characteristic structure. — I). 



