H()2 UlATOMACE.l-; — CH.KTOC.KROS 



Temperature; I7..i, mean of (> obs., max. 2H.s, min. IH. 



Salinity: Ho. 2.!, mean of i obs., max. HO.ut, min. 84..5K ^common). 



Plankton-type. This species enters the Styli-plankton, l)ut its 

 rare occurrence in the ocean indicates that it is a neritic form. 

 Occiu's in the Mediterranean, the l^>ed Sea and the Gulf of Benfjal. 



— Xin. Xr. 



CHiETOCEROS DIVERSUS Cl. 



fc. (l/r. rai-. iciiiiis ('.I,. A Treatise on the l:*liyto-|iIan)dnn I'l. II liij.. 2.) 



JariiKirii: 7" N. 53"^ W. 

 1S9S Fehriiarij: 16^ N. 71" \V. 



Marvli: 7^ N. 55^^ W.; 10" N. 58" W. 



June: lO" N. 58^ W. 



Aiinii^t: 40" N. 6(3" AV. 



Dcrrinhcr: 29"- S. 4H" W.; 18^ N. t>7 W. 



Temperature: 25.1, mean of 8 obs.. max. 27.2. min. 20.?. 



Salinity: Hi. 84, max. SB.oi, min. HH.os. 



Plankton-type. This species occurs along the coast of South 

 America and follows the Equatorial Current into the r;aril)bean Sea, 

 continuing with the Florida Current to 4i> N., which latitude it 

 reaches, as Desmo-plankton usually does, in August. The occurence 

 along the coasts and the low salinity indicate it as a neritic form. 

 Noted from the Mediterranean, Med Sea. Indian Ocean and Java. 



— .Vf. 



CH^TOCEROS (ATLANTICUS VAR ) EXIGUA Cl. 



(.\ Treatise on tlic I'liyto-planlilon I'l. I I1g. !).) 



IS'tS JaiiiKirii: 7" N. 53° W.; 44° N. 17" AV. 



March: 'Mr N. 35° W. to 45° N. 13" W.; 49^ N. 18" W 



April: 4«)° N. 19" W.; 48° N. 29° W. io 50° N. 9" W. 



Jiitw: 48" N. 17° W. 



AiiguHt: Azores. 



Xnrcmhc/-: Azores; 56"^ N. 23" W. 

 ISHlt Jan liar//: 3:i° N. 15" W. 



March': 34° N. 40° W. 



April: W° N. 13" W. 



