DIA'I'OMAC.K.V. — CH.ITOCKROS 29:') 



CHi^TOCEROS CRIOPHILUS Casti:. 

 (Ci. A Treatise on the I'liytoplanktoii I'l. 1 fig. (5.; 



1898 March: 2H^ N. 17^ W.; 40^ N. 09^ W. 



April: 49^ N. 19^ W.; 40"— 41^ N., 70^ and 58" W. 



May: 42" N. 45" W.; 70"— 72" N. 14"— 16" W.; 67"— (W N. 



25"— 21" W.; ()2" N. 2" W, 

 Jane: 66 N. 26^ W. to 67*^ N. 29 AV. and thence to ♦)9 X. 



15" W. ^common); ()8" N. VA K.; 1)\ X. 2;H" R. 

 Julii: 62" N. 0" W. 



Aufjusf: Faroes; 76"'— 80" N. 12"— 11' E.; 81" N. 24" E. 

 Septcnihcr: 60" X. ;V W.; A/oros; 75"— 76" X^ 17"— 13" E. 

 (h'toher: Azores. 



Xnrrii,l„'r: 45"— 48" X. 52"— 49" W. 

 Ih-crnilwr: 45" X. 51" W. to 41" N. 66" W. 



1899 Mair- 65" N. IS'" W. to 67" X. 16" AV. 



June: iS'^^ X. H" W. to 70^ X. 13 W. « every where common), 

 71" X. 10" W. to 73" X. 4" W. (at some spots common). 

 AuguM; 73° X. 22"— 24" W. (rare). 

 SepU'inbcr: 72" X. 16" W. (rare). 



Temperature: (i-i. mean of 46 obs., max. 20. i. miii. — -l.a. 

 Salinity: 34.23, mean of 45 obs., max. 36.i.-,, inin. al.i.fs. 

 Plankton-type. Decidedly arctic, pelagic species. — T. 



CH/ETOCEROS CURVISETUS Cl. 



(Gr.\n 1). Norske Nordiiav-Expedition 1876—78 I'lolopliyta. PI. ill tig. 48). 



1898 Jamianj: \\ X. 20^ AV. to 20 X. 18" \V. 



March: 21" X. 18" W.; 23^ X. 17 W.; 58' X. (r E.; 7" X. 



55" W.; 33" N. 48^ W. 

 Jane: 42" X. 9' W. 



Aagiiat: 58" N. 2" W.; 60" X. 2"— 3" W. (rare). 

 S,pteinl>er: 59"— 60" X. 2" W.; 66^ X. 18 W. 



Temperature: 14.?. mean of 12 obs., max. 25. n, min. 6. 

 Salinity: Mi.iu, mean of 6 obs., max. 35, n, min. 33, ts. 

 Plankton-type. Xeiitic. form of the temperate Atlantic, occur- 

 ring- onlv occasionallv in the ocean. — Xm. 



