Sdiii (.>rLni(ll;ig for min Bearbeidelse at' Xordliavsexpedi- 

 fionens Tlialamophorer forelaa der en særdeles ligholdig 

 Samling af Bundiirover. Efter Kimferencu med Hr. 

 Prof. G. 0. Sårs, for hvis velvillige Hjælp ved flere An- 

 ledninger jeg lier udtaler min Tak, har jeg dog ikke fundet 

 det nødvendigt at gjennemgaa alle Bundproverne. da de 

 nemlig ofte er tagne med forholdsvis korte Mellemrum og 

 saaledes Faunaen kunde formodes at være meget ensartet 

 ])aa de Stationer, der laa i hinandens N;erhed. Dette har 

 ogsaa vist sig at være Tilfældet ved den fiirelohige Under- 

 sogelse, som jeg foretog af ca. lUO Bundprover fra alle 

 Dele at Nordhavet. Disse Bundprøver var fordelt saaledes: 



Fra. Sognefjorden 1 Bundprove 



„ det graa Ler langs Norges Kyst . . o4 Bundprover 



„ - „ - ved Beeren Eiland . . o „ 



„ - „ - Sjjidsbcrgen .... 11 ,, 



,, - ,, - lan Mayen 4 ,, 



„ - ,, - Ishmd 4 ,, 



,. - ,, - Færoerne . ... 1 „ 



„ Overgangsleret 14 



„ Biloculinaleret 2hi ,. 



„ RIialKlamniinaleret 8 „ 



Tilsanimen 103 Bundprøver 



Ved den foreløbige Undersøgelse er Bundproverne 

 behandlet paa følgende Maade: Det Kvantum, der skulde 

 undersoges, i Regelen 3 — 4 cm. 3, blev opblodt og udrort i 

 Vand, hvorpaa den gramsede Vædsko frasiltes gjennem en 

 fin Sil af ca. O.US mm.s Maskevidde. Det tili)ageblevne 

 undersøgtes under Mikroskopet. 



Paa Grundlag af de Erfaringer, som ovennævnte 

 Fremgangsmaade gav, udvalgtcs nu et begrænulset Antal 

 af de paa Arter og E.\emplarer rigeste Bundprøver, ialt 

 19, ligelig fordelt over alle Lersorter. Disse Bundprover 

 er fra følgende Stationer: 9, 92, 255, 135, 192. 2l)2. 2(.)8, 

 287, 342, 3GS, 355, 353, 296, 214. 4i). 48, 231. 223. 37. 



Disse 19 Bundprover blev behandlet etter den- af Dr. 

 Madsen beskrevne Methode ,, hvortil '/4 eller ^^ Liter af 



' V. Madsen, Istidens Foraminiferer i Danmark og Holsten. 

 Kjøbeubavn. lS!).'i. 



Den norske X(n'dli.ivso.\i)edition. H.Tns Kijrr: Tli.il:uiio|jliora. 



A 



particularly large collection of iiottoni-samples formed 

 the basjs for my investigation of the Thalamophora 

 of the North Atlantic E.xpedition. After consultation 

 with Prof. G. 0. Sårs, for wliose ready assistance on 

 severaLoccasions I would here express my thanks. I have 

 not considered it necessary to go through all the samples, 

 as they were often tåken at eomparativi'ly short intervals, 

 and the fauna might naturally be supposed to be very ho- 

 mogeneous at stations lying near to one another. This 

 has also proved to be the case in the preliminary exami- 

 nation that I made of about 100 bottom-samples from all 

 parts of the North Sea. These samples were distributed 

 as follows: 



From Sognefjord 1 sample 



„ the gray clay along the Norw. coast . 24 samples 

 „ - „ - near Bear Island . . 3 „ 



,, - ,, - „ Spitsbergen ... Il 



- „ - .. Jan May?n Island 4 ,, 



- „ - „ Iceland .... 4 „ 

 „ - „ - „ Farcie Islands . . 1 „ 



„ - transition clay 14 „ 



„ • Biloculina , 23 ,, 



„ - Rhabdamnun.-i clav 8 



Total 103- samples 



In the preliminary investigation, the samples were 

 treated in the foUowing manner: the qu:uitity to be examined, 

 geneially 3 or 4 cubic cm. was softened and stirred up 

 in water, and the muddy licpiid strained through a fine 

 sleve, whose meshes measure aliout 0.08 mm. in width. 

 What was left was examined under the nicroscope. 



With the experience gained from the above method 

 of procedure as a basis, a limited iiumbor of samples in 

 which species and specimens were most abundant, were 

 then selected — 19 in all, distributed eipuiUy among all 

 kinds of clay. Theso samples were from the following 

 stations: 9, i)2, 255, 135, 192, 262, 268, 287, 342, 368, 

 355, 353, 296, 214, 40, 4b, 231, 223 and 37. 



These 19 samples were ti-eated accordiug to the 

 method described by Dr. Madsen 1, in which from ^U to '/a 



V. Madsen. Istidens Foraminifera i Dauniaik 

 Copenliagen. ISii.'.. 



Holsten. 



