Station 40. 



Astrorhiza arenaria (c), crassatina (c), Cornuspira 

 foliacea (c), Hyperammma elongata (r), Biloculina laevis 

 (v), arctica (r), sphaera (n), Textularia agglutinans (n), 

 Nodosaria communis (r), panperata (n), Glandulina laevi- 

 gata (c), aequahs (n), Vagimdina costata (n), Poly mor pliina 

 angusta (r), acztfø (n), Haplophragmium latidorsatum (v), 

 Flanorbulina Wilder sclorfii (c). 



Station 274. 



Astrorhiza crassatina (c), Psammosphaera fusca (n) y 

 Tholosina lulla (c), Rhabdammina abyssorum (v), discreta 

 (n), Hyperammma arborescens (r), Nodidina scorpiura (c) r 

 Biloculina simplex (r), Miliolina tricarinata (r), seminidum 

 (r), Valvulina conica (r), Nodosaria obliqua (r), Haploph- 

 ragmium crassimargo (r), Truncatulina lobatida (c). 



Paa Hydroider fra Nordhavsexpeditionen saaes mange 

 Exemplarer af Rupertia og Truncatulina fastheftede. 

 Desuden var ofte en Mængde Thalamopborer hørende til 

 en hel Del Arter infiltrede i Hydroidernes traade. 



I Nordhavsexpeclitionens Plankton fandtes ingen pe- 

 lagiske Thalamoporer. Derimod liar jeg fundet mange 

 Exemplarer af Globigerina bulloides i Plankton, der paa 

 Foranstaltning af dr. Hjort blev tåget mellem Trondhjem 

 og Island i April — Juni 1898 1# Disse Globigériner fand- 

 tes dels med dels uden Pigger dog sjelden i betydeligt 

 Antal i hver Planktonprøve. 



Foruden Thalamopborer saaes i Bundprøverne ofte 

 mange uorganiske Levninger af andre Dyreformer. Dog 

 kunde ingen Radiolarier opdages, skjønt enkelte Arter af 

 disse undertiden forekommer i Plankton fra Nordhavet, 

 saaledes optræder Acanthoma echinoides Haeckel af og til 

 i uhyre Mængde i Plankton fra Norges Vestkyst, medens 

 en anden Art Acanthostaurus pallidus Haeckel er meget 

 sjeldnere. 



Bemærkninger til Tabellen. 



Følgende Oplysninger er nødvendige til Forstaaelse 

 af Tabellen: 



De under hver Kub rik opførte Tal betegner Antallet 

 af Stationer, hvorfra en Bundprøve eller en Prøve fra 

 Skrabningerne er undersøgt. 



Jeg har inddelt de forskjellige Lersorter ialt i 16 

 Underafdelinger for at vise Thalamopharernes geografiske 

 og bathrymetriske Udbredelse og ikke fordi der altid 

 raader nogen væsentlig Forskjel in den hver af disse Un- 

 derafclelingers Fauna. Det graa Ler er ved Hjælp af den 

 63de Breddegrad og den 19de Længdegrad delt i 3 Dele, 

 hvoraf den sydlige omfatter 10, den nordlige 20 og den 

 østlige 5 Stationer. Af Overgangsleret og Biloculinaleret 

 har jeg adskilt 3 Partier, et sydligt og et norclligt, der 

 har sin naturlige Grændse i Tværryggen mellen elet norske 

 og det svenske Dyb, samt et østligt Parti mellem Rbab- 

 damminaleret og de to nævnte Havclyb. Khabdamminaleret 

 er delt i 2 Dele ved den 19de Længdegrad. 



Den nordligste Station var fra 09° 40 N. B. 11° 30 L. W. 



5. 0. 1898. Våndets Temperatur -f- 0,8. 



Many specimens of Rupertia and Truncatulina atta- 

 ched were to Hydroida from the North Atlantic Expedition. 

 There were frequently moreover, a number of Thalamopora, 

 belonging to a great many species, entangled in the fila- 

 ments of the hydroids. 



There were no pelagic Thalamophora in the North 

 Atlantic Expedition's plankton. On the other hand, I 

 found many specimens of Globigerina bulloides in plankton 

 which, under Dr. Hjort/s direction, was taken between 

 Trondhjem and Iceland, between the months of April and 

 Juni 1896 r These Globigerina were found both with 

 and without spines, but unusually in large numbers in 

 every plankton sample. 



Besides Thalamophora, many inorganic remains of 

 other animal forms were frequently seen in the bottom- 

 samples. No Kadiolaria, however, could be discovered 

 although a few species sometimes occur in plankton from» 

 the North Sea. In this way Acanthoma echinoides Haeckel 

 now and then appears in immense numbers in plankton 

 from the west coast of Norway, while another species. 

 Acanthostaurus pallidus Haeckel is far less frequent. 



Remarks on the Table. 



The following information is necessary to an under- 

 standing of the table: 



The figure under each head denotes the number of 

 stations from which a bottom-sample or a sample from the 

 dredgings has been examined. 



I have divided the various kinds of clay into 16 sub- 

 divisions in all, in order to show the geographic and 

 bathymetric distribution of the Thalamophora, and not 

 becoause there is always some essential difference in the 

 fauna of each of these sub-divisions. The gray clay is 

 divided, by the aid of the 63rd parallel of latitude, and 

 19th of longitude, into 3 parts, of which the southern one 

 includes 10, the northern 20, and the eastern 5 stations. 

 I have divided the transition clay and the Biloculina clay 

 into 3 divisions, one southerly and one northerly, which 

 having their natural boundaries in the cross ridge between 

 the Norway and the Swedish deep., and an easterly divi- 

 sion between the Rhabdammina clay and the two above- 

 mentioned deeps. The Rhabdammina clay is divided into 

 two parts by the 19th parallel of longitude. 



The most northerly station was 09° JO N. Lat. & 11° 

 'Long. Juni 5, 1898. Temperature of water: 0.8°. 



30 W. 



