1)1 ATOM, XCK.V. — Krfizosor.K.MA H Ht 



Temperature: 1 4.s, mean of 27 ohs.. max. 27. i, min. S. 



Salinity: .'i.').,!,;. mean of 21 obs., ma.\. H().n, min. )i2.i,(i. 



Plankton-type. Tlii.-< species occurs alon;? tljo conlincnl;!! 

 coasts from (lape Verde to the Kn!i.lisli (lliannci and west of the 

 Hritisii Islands to the Shetlands. Kare specimens drift to the south 

 of Iceland. It occurs also alon^' the North American coast from the 

 Newfoundland Banks at least to 67" W. It has only once been ob- 

 served north of South America. It is very common in the summer 

 in the Enghsh Channel and in the southern North Sea. According 

 to Le.mmer.maxx it occurs in the Mediterranean, the Pacific and the 

 (lliiiui Sea. I have seen it in plankton Ivoiu .ledo l!ay. — \ni. 



RHIZOSOLENIA STYLIFORMIS Hktw ' 

 (Van ilEnuiK Syn. PI. f,.\.\Vltl tig. 1—5.) 



18U8 ./(iininri): 0" N. 2& W. to 21 N. 17 W.; Azores to l(r N. 

 11 W.; ()8^ N. 20 \\.\ ~r N. oH W. to 14" N. 49 W.; 

 Caribbean Sea ; 25'— 82° N. 74' \V. 



February: 50' N. 10" \V.; 68° N. 17 W.; Caribbean Sea; Ba- 

 hamas; 26' N. 71' W. 



March: 4'— 1" S. 10'— 15" W.; 18' N. 18" W.; 25° N. 16' W.; 

 88' N. 82' \V. to the Kngl. Channel; from 40° N. 68°— 72- 

 W. to 51 N. 27 W. and the Hngl. Channel: 15° N. 49° W. 

 and 25- N. 41" \V., rare; Caribbean Sea; 28°— 82° N. 74' W. 



April: area between 84° N. 75" W., 40° N. 70' W., the Kngl. 

 Channel and 41° N. 19° W.; 58° N. 88° W. to 59 N. 22' 

 \V. and at 60° N. 4° \V., rare. 



May : Azores to Cape Finisterre; from New York to the mouth 

 of the Engl. Channel; area between 57° N. ^dty-" W., (51 N. 

 28' W., 60° N. 9" W. and 57° N. 25° W.; Davis's Strait, (58 

 N. 54° \\'., very rare; area between 11" N. 52" W., K) N. 

 71° W. and 28° N. 56' W. 



June: area between 45° N. 26 W., 42 N. 9 \V. and 18 N. 

 17 \V.; area between S. Iceland, the Fiiroes and 60" N. 9- 

 \V.; 19 \. iV.V W. to 81' N. 50^ W.; 41" N. 59' \V.; 45' N. 

 n \V. 



' Ostenfeid's data used. 



