THE DEPOSITS OF THE SEA- BOTTOM. 7, 



Station 141; 37-0 gram. Some Haplophragmia; a few Miliolinae, Truncatulinse and other rota- 

 liform Foraminifera; 1 nodosarine Foraminifer. 



Station 143; 16-0 gram. 1 Miliolina, 1 Biloculina, and 1 rotaliform Foraminifer. 



As is shown by the table, the larger Foraminifera show a far greater variety, and are found 

 in the specimens with far greater irregularity than the smaller ones. This is caused, partly by the 

 fact that rather large territories are found where they are wanting completely or in part, as for in- 

 stance south of Iceland and at the west coast of Greenland, while on the other hand they are speci- 

 ally numerous between Iceland and Jan Mayen; partly also the cause is that the predominant forms 

 are very different in the different localities, while the smaller Foraminifera almost exclusively were 

 Globigerinse. The forms of this genus being more than o-5 mm in diameter, are in the specimens al- 

 most exclusively found in two localities, but found in these in great quantity, while in these places 

 the other large Foraminifera are either quite wanting or only found in subordinate quantities. One 

 of these localities is situated southeast of Iceland, the other and larger one southwest of Iceland and 

 between Iceland and Greenland. The genus most widely distributed of all the larger Foraminifera, 

 is Biloculina, and even if it is almost always only found in small numbers, it is nevertheless some- 

 times so conspicuous in the specimens on account of its size and clean white colour, that Schmelck 

 has designated these specimens as Biloculina clay, while, as before mentioned, I have not thought it 

 necessary to abandon the common name of Globigerina clay on account of some more Biloculinae than 

 usually being found in the specimen. Besides it is only in the specimens 112 and 113 between Ice- 

 land and Jan Mayen that this genus occurs in larger number than 1 or 2 individuals in each gram 

 of the specimen, and where accordingly it may have any influence on the appearance of the bottom 

 species. Upon the whole it is most numerous between Iceland and Jan Mayen, as also between Ice- 

 land and Greenland and southwest of Iceland, where in several specimens it is the only genus of 

 larger Foraminifera. The nearly related genus Miliolina is found distributed on about the same terri- 

 tories and besides north of the Faroe Islands, but in all these places only in small numbers. 



Among the other genera of Foraminifera the rotaliform ones have first to be noticed, and of 

 these especially the genus Truncatulina, which may easily be distinguished from the others, and is 

 sometimes found in very great quantities. With the exception of a couple of specimens between Ice- 

 land and Greenland it is only found in a couple of specimens north of Iceland, and especially in the 

 open sea between this island and Jan Mayen it is often met with in quantities of more than one hundred 

 individuals in each gram of the specimen; nearer the land it is found in considerably smaller numbers, 

 and it disappears almost completely, whether we move to the west along the northern coast of Ice- 

 land or to the south towards the Faroe Islands. As it is rather insignificant, it has nowhere any 

 influence on the general appearance of the specimen, which, to be sure, also holds good with regard 

 to all the other genera, excepting Globigerina and Biloculina. I have not been able to refer the other 

 rotaliform Foraminifera to any genera; contrary to the Truncatulina they seem to occur in the greatest 

 numbers nearer the land. Thus they are found on the whole territory between Iceland and Green- 

 land , but they are most numerous in the specimens no. 85, near the southwest coast of Iceland , and 

 no. 94, at the east coast of Greenland. They are found in the greatest quantities at the western part 



The Ingolf-Expedition. I. 3. IO 



