1 ) I A r( > M A r. I :. I-. — s K I-. I . i:t( ) x i-..\i A Hi^ 1 



Ani/i'sf: 72 N. 2() K.. rate; o.') \ 2(i \V. lo .")(; X. :',s W.. 



very common. 

 St'ptcmbrr: 68 —09^ \. 8-^-10 W'., rare; IV N. IS K. to 80 



N. 13 Iv, rare to coiimiou; olj .\. 23 W. to 53 X. .jl 



W., common at 33 i<) W. 

 ( h-iohci-: o(i" N. 23^^ W., rare; 53 N. 31 \\'.. not rare. 

 .\<>r,'i„l>i-i-: 52°— i-8" N. 48-— 4() W., rare. 



Temperature: 12. mean of 3S ob.s.; ma.\. 2H. min. 3..^ (only 

 such samples considered as contained this species abundantly). 



Salinity: 31.79, mean of 38 obs., ma.\. 3().:i7. min. 32..sl'. 



Plankton-type: This species is found in the Pacific and in the 

 .Mediterranean. It appeared in .hniuary 189B in the S. K(|uatorial 

 Current and followed it to the .\. of S. America and into the Carib- 

 bean Sea. It was seen in December in the lirazil Current. In the 

 east Atlantic it follows the African coast to the (lanaries and the 

 A/ores, whence it continues towards the Knjjl. Channel. In April and 

 May its area of distribution extended across the whole Atlantic be- 

 tween 40" and 50" N. It had, already in May, advanced beyond 

 (iO and reached Iceland in June. From S. Iceland it went towards 

 E. (Ireenland and was in October seen in Davis's Strait. On the 

 other hand it went from S. Iceland towards the Shet lands. It was 

 seen in September .\. of Iceland and, already in Au.2:u.sl, at Sjiit/- 

 bersjen. — N. 



SKELETONEMA COSTATUM (Ckkv.).^ 



Van Hki uck .Syn. I'l. .XCl tig. 4--6l. 



is^ts Mfu-c/i: 37 N. 7 1 W. 



Aiicjasr: rare in the Irish Channel, at the Shetlands and at 

 Westmaimai). 



Temperature: 10.- — 13..^. 



Salinity : 3 i.,,.-, to 31.i(;. 



Plankton-type. I'oimd in .ledo Day, .lapan. and in the (iulf 

 of Dent^al. It is ap|)arent fioin the above data, that this s|)ecies. so 

 abundant near the coasts, is a neritic form. As it occurs in the 

 .North Sea and Skagerak together with northern species it is to be 

 considered as beloiiiiins to As. 



Ostenfeld's data usotl. 



