DIATOM ACE^. — CHyr.TOCEROS 305 



Xavciihr/-: 45° N. bOP W., rare. 

 1899 J\Jay: 58^ N. V—H' E. (common). 



Temperature: 81, mean of 1 obs., max. 11, min. (i. 

 Salinity: H8.95, mean of 4 obs., max. 35. 13, min. ;52..-,h; excep- 

 tionally 23.52. 



Plankton- type: A^. 



CH^TOCEROS LACINIOSUS SchOtt.' 

 (Gran. Den Norske NordhavsExpedition PI. 1 fig. 4—7). 



1898 April: 6(r N. 21° W., rare. 

 July: Westmannao, common. 

 August: Westmannao, rare. 

 September: Disco, not rare. 

 Xnveinber: (i3' N. 13" — 1(r W., very rare. 



December: 4tr N. 50" \V to 43" N. ()1° \V., rare to common. 



1899 May: Westmannao, rare; 60" N. 'r W., rare. 

 June: Westmannao, rare. 



Temperature: 8.1, mean of 12 obs., max. lO.g, min. 2.7. 

 Salinity: 33,27, mean of 12 obs., max. 35.s2, min. 31.96. 

 Plankton-type. Occurs in the northern Pacific (Lemmermann). 

 — As. 



CH.ffi:TOCEROS LONGISETUS Cl. 



(Kongl. Sv. Vetensk. Akad. Hand!. Vol. XXXTV n. 1 PI. VII fig. 25-29). 

 1898 March: T N. 55' W. 



Temperature: 25. 0. 

 Plankton-type: Nt. 



* Ostenfeld's data for r. Im-ininsus Scliiitt, but not for »'.'. /«f. f'j7.», used. 



20 



