THE DEPOSITS OF THE SEA-BOTTOM. 



of the Foraminifer; sometimes, perhaps, no lime is left at all. Such highly ferruginous Foraminifera 

 are especially found in a few specimens between Iceland and Greenland, and in a few south of Ice- 

 land; larger not ferruginous Foraminifera are chiefly found south and southwest of Iceland, and, when 

 found in great numbers, they impart to the specimen a rather peculiar, whitish, gritty appearance. 



Of the other forms of Foraminifera the rotaliform especially play the most conspicuous part. 

 In most specimens they occupy the place next to the Globigerinae , and in a few they are found in 

 the same quantity as, or even in larger quantity than, these. This, for instance, is the case with some 

 specimens at the northern coast of Iceland, with a few specimens at Jan Mayen, as also with a few 

 ones east of Iceland and north of the Faroe Islands, and finally with the single specimen at the east 

 coast of Greenland. These specimens do not appear to any special degree to form separate regions, 

 as the) - are situated among the others without any recognizable order; the only thing that may be 

 given as a common rule, is that all the specimens south and .southwest of Iceland and along the 

 south and west coast of Greenland have an absolutely predominant quantity of Globigerinae; thus it 

 woidd seem that we shall have to pass to the north of the ridge between the Faroe Islands and 

 Island in order to find the Globigerinae less predominant. The other Foraminifera are of very small 

 interest in this connection; they are most frequently found in a few specimens between the Globi- 

 gerinae, and it appears to be more or less casually, which of them are found in the individual 

 specimen. As an exception from this rule it must be pointed out that the genus Nonionina is 

 especially conspicuous in a couple of specimens, north of the Faroe Islands where it is found in 

 almost the same quantity as the rotaliform Foraminifera and the Globigerinae; and further also that 

 the genus Miliolina in a single specimen , no. 64 , and Textularia in specimen no. 66 , both of them 

 south of Iceland, are met with in an extraordinary great quantity, almost as great as that of the 

 Globigerinae. The zoological examination of the Foraminifera will, of course, trench on the same 

 questions with far greater exactness, and accordingly there is no reason for dwelling further on them here. 



b. The Foraminifera over o-5' nm . In the following table I have noted the types of these found 

 in the specimens, and in order to give a notion of their importance for the composition of the bottom- 

 specimen in question, I have at each station noted the weight of the portion of the specimen, of 

 which these Foraminifera were taken. 



Stations 2 — 9; no Foraminifera. 



Station 10; 9-5 gram. 1 Cristellaria, and 1 Biloculina. 



Station n; ca. 2 gram. About 10 Biloculinae. 



Station 12; iro gram. About 10 Biloculinae. 



Station 13; 28-6 gram. No Foraminifera. 



Station 17; 18-2 gram. A few Biloculinae. 



Station 18; 187 gram. About 10 Biloculinae. 



Station 19; 21-9 gram. About 15 Biloculinae. 



Station 20; 16-4 gram. 1 Biloculina. 



Station 21; 32-9 gram. One of each of the following genera: Truncatulina, Miliolina, Pulvi- 

 nulina, Gaudryina, Textularia. 



Station 22; 16-4 gram. 1 Biloculina. 



