808 



uiA'i'r),\iAi;K,i': -cH/isToCKiui.':! 



Temperature: :^1..,, mean of 2K ohs., max. 2S, rain. V.\j:. 

 Salinity: .'in.u.^, mean of 12 obs,, max. ;>7.2i, min. H't.as- 

 Plankton-type. Noted from the Mediterranean, the Ked Sen, 

 the Indian Ocfan and the Paciiic — N. {/)). 



CH^TOOEROS RUDIS Cl.^ 

 ('■. hoi-mli.-- var. nidi.-' Cr,. A Treatise of the l')iyto-plankton, I'l. I fig. o;. 



1S97 Dernnbcr and 



1898 Jaininnj: Wl' X. ;i;i W.; 7 N. h\V W. to VI X. iVr \V.; If)' 



X. 7()^ W.; 25^— Ho- N. 71- W 

 February: ir S. i) — 1 K.; (>" S. 12 W.; IH — 1(i' X. 7()-— 



71- \V.; 26"- X. 71- W. 

 .Vft/-r//: ()- S. 4- W.; 1° S. 27 W.; 1()- N. 20' W,; 2S — 



H(»- X. .ns-— :!5" W.; (t^ X. ol)- W.; 28- X. IV \V. 

 April: 11- N. 7()- W.; ■]]° X. 75- W. 

 .1/rt//: 28- N. 45°— 17- W.; Azores. 

 Jiitir : Azores. 



Jdly: 1o- X. 71° AV.; 88° X. 71' \V.; 11= X. (if)-— 08- \V 

 Amjnst: 17" N. 71" W.; 22- N. 71' W.; 10'- X. ()7- W. to 



i2- X. 18- W. 

 September: W N. 27- W.; l-'r X. 71° W.; 20- X. 15- W'.; 



38° X. 71° W.; 42° N. 57^ W 

 October: 21° S. 3()° W.; .38- X. 71' \V.; 11°— 12- X. 59-— 



50- \V. 

 Xucpiiiher: 40°— 1-2° X. (i7°— (Jl-- W.; 1-1' N. 55- W.; 17- X. 



41° W. 



1899 April: 9- X. 59- \v. 

 May: 25^ S. 1'" E. 



Temperature: 2.3. 1, mean of 58 obs., max. 28.s, min. 10. 



Salinity: 35.oi, mean of 3(5 obs, max. 37.2i, min. 32. hi, excep- 

 tionally 20.iH. 



Plankton-type. Occurs in the eastern and western tropical 

 Atlantic, not far from the coasts, which together with the low mean 

 salinity .indicates that this species is essentially a neritic form. — 

 Nt and D. 



' Since tfie above was written, I found this form to be the some as ('. 

 coarrtalus Lauder. The abwe name must then be abolished. 



