niATo\i.\(.i;.i. — c.iM.Tor.KKos iK •! 



1S<)<I April: 1-8 X. *» W".. rare; Kiirck's. not rare. 



Mdji: ()1 X. () W. very rare); Fitrrtes. 



Jiinr: 1-1 N. 1) ^V. and 7)5 X. ti W. (rare). 



St-pfrinhri-: Ih X. 18 K. to 80 N. 1.'? K. and 81 X. Ki W. 

 not rare 



Temperature: ti.o, incaii of lo oli.-;.', max. Id, min. I.n. 



Plankton-type. The low lemperatiire and saliiiily prove that 

 this species is to be considered as an arctic neritic form, its occurence at 

 the north coast of Soutli America in January 1898 is then of the 

 greatest interest. Xoted from Jedo Bay. Japan. As and A// 



CHiETOCEROS DIDYMUS (Kiir.). 

 (Ci.. Hill. Kongl. Sv. Vctcnsk. Akiul. IlaiitU. \u\. XXll: )\ n. 1 IM. i tig. H. 4.i 



18<)8 Jaimarir. -^ ^ ^^ ^^' 



Mnrrh) 21' N. 18 W.; 48- X. (V \V.; 58' N. 6^ Iv; i:5 — 



41 N. 41^—49' W. 

 Mnif. 48- N. 33^ W., rare. 

 Scpii'inhr/-: ()() ' X' 2' W., rare. 



Temperature: 12..-,, mean of 7 obs.. max. 18, min. (>. 



Salinity: Ho.i.-,. mean of o obs., max. Hb.iu, min. o4,.v... 



Plankton-type. This species is evidently a neritic form, oidy 

 occasionally occuring in the ocean, and then amoncr Styli-plankton. 

 Occurs in Jedo Bay. Jai)an, and in I'uget's Sound. Sc.hrouki; men- 

 lions il, from Naples. — Xin. 



CH^ETOCEROS (DIDYMUS VAR.) LONGICRURIS Cl. 



(A Treatise on llic IMiylo-|il:inkl(in IM. I lig. 11, 17. 



1898 Mnrrli-. 21 X. 18 W.; 41 X. 21 \V.: 12 N. \^ \\ . 

 Ajtiil: 12 X. 17 \V, 

 May: 49' X. 2;; W 

 August: A/ores. 

 iJcceniltcr: 29 S. 49 W'.. verv conuiion. 



Only such samples considered as contained this specii-s aliundanliy, 



