Som Grundlag for min Bearbeidelse af Nordhavsexpedi- 

 tionens Thalamophorer forelaa der en særdeles righoldig 

 Samling af Bundprøver. Efter Konference med Hr. 

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

 ledninger jeg her ndtaler min Tak, har jeg dog ikke fundet 

 det nødvendigt at gjennemgaa alle Bundprøverne, da de 

 nemlig ofte er tagne med forholdsvis korte Mellemrum og 

 saaledes Faunaen kunde formodes at være meget ensartet 

 paa de Stationer, der laa i hinandens Nærhed. Dette har 

 ogsaa vist sig at være Tilfældet ved den foreløbige Under- 

 søgelse, som jeg foretog af ca. 100 Bundprøver fra alle 

 Dele a f Nordhavet. Disse Bundprøver var fordelt saaledes : 



Fra Sognefjorden 1 Bundprøve 



„ det graa Ler langs Norges Kyst . . 34 Bundprøver 



„ - „ - ved Beeren Eiland . . 3 „ 



„ - . „ Spidsbergen .... 1 1 ,. 



„ „ lan Mayen 4 „ 



„ - „ - Island ...... 4 „ 



„ „ Færøerne 1 „ 



„ Overgangsleret 14 ., 



„ Biloculinaleret 23 ,. 



„ Rhabclamminaleret 8 „ 



Tilsammen 103 Bundprøver 



Ved den foreløbige Undersøgelse er Bundprøverne 

 behandlet paa følgende Maade: Det Kvantum, der skulde 

 undersøges, i Regelen 3 — 4 cm. 3 , blev opblødt og uclrørt i 

 Vand, hvorpaa den grumsede Vædske frasiltes gjennem en 

 fin Sil af ca. 0.08 mm.s Maskevidde. Det tilbageblevne 

 undersøgtes under Mikroskopet. 



Paa Grundlag af de Erfaringer, som ovennævnte 

 Fremgangsmaade gav, udvalgtes nu et begrændset Antal 

 af de paa Arter og Exemplarer rigeste Bundprøver, ialt 

 19, ligelig fordelt over alle Lersorter. Disse Bundprøver 

 er fra følgende Stationer: 9, 92, 255, 135, 192, 262, 268, 

 287, 342, 368, 355, 353, 296 ; 214, 40, 48, 231, 223, 37. 



Disse 19 Bundprøver blev behandlet efter den af Dr. 

 Madsen beskrevne Methode i, hvortil 1 / i eller J / 2 Liter af 



Y. Madsen, Istidens Foraminiferer i Danmark og Holsten. 

 Kjøbenhavn. 1895. 



Den norske Nordhavsexpedition. Hans Kiær: Thalamophora. 



Å particularly large collection of bottom-samples formed 

 the basfs for my investigation of the Thalamophora 

 of the North Atlantic Expedition. After consultation 

 with Prof. Gr. O. Sars, for whose ready assistance on 

 several occasions I would here express my thanks, I have 

 not considered it necessary to go through all the samples, 

 as they were often taken at comparatively 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 Norvv. coast . 24 samples 

 „ - „ near Bear Island . . 3 „ 



„ - „ - „ Spitsbergen ... II „ 



,, „ „ Jan Mayan Island 4 „ 



„ - „ - „ Iceland .... 4 „ 



„ - „ - „ Faroe Islands . . 1 „ 



„ - transition clay 14 „ 



„ - Biloculina „ 23 .. 



„ - Rhabclammina clay ...... 8 „ 



Total 103 samples 



In the preliminary investigation, the samples were 

 treated in the following manner: the quantity to be examined, 

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

 in water, and the muddy liquid strained through a fine 

 sieve, whose meshes measure about 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 number of samples in 

 which species and specimens were most abundant, were 

 then selected — 19 in all, distributed equally among all 

 kinds of clay. These samples were from the following 

 stations: 9, 92, 255, 135, 192, 262, 268, 287, 342, 368, 

 355, 353, 296, 214, 40, 48, 231, 223 and 37. 



These 19 samples were treated according to the 

 method described by Dr. Madsen 1} in which from 1 j i to l f 2 



1 V. Madsen, Istidens Foraminifera i Danmark og Holsten. 

 Copenhagen. 1895. 



