SECTION I 

 FORAMINIFERA 



FROM UPTHRUST MUDS ABOVE THE DRYGALSKI GLACIER, SOUTH- 

 EAST OF MOUNT LARSEN 



GENERAL REMARKS ON THE COLLECTION 



This deposit is a bluish-grey calcareous clay or ooze, in which the larger foraminifera 

 and ecbinoid spines arc conspicuous. It was collected by Prof. T. W. Edgeworth 

 David from a marine deposit about twenty feet above sea-level, just north of the 

 Drygalski Glacier, December 22 and 23, 1908. 



The collection of Foraminifera obtained by washing the material, although not 

 very rich in species, nevertheless presents several points of much interest. The 

 majority of the larger tests belong to Biloculina, Nodosaria (Glandulina), Cassidulina, 

 and Truncatulina. The two former genera are almost equally abundant. By the 

 occurrence of Biloculina sarsi we have additional and weighty evidence in support 

 of the bipolar theory of the distribution of marine life, for that particular species forms 

 a large proportion of the " Biloculina Clay " of the North Sea. Further evidence in 

 this direction is afforded by the glanduline form of Nodosaria occurring here, as well 

 as Truncatulina refulgens, another of the abundant forms in this deposit, and 

 Nonionina stelligera. 



Notwithstanding the presence of many unrestricted species, as regards depth of 

 habitat, there is a considerable proportion f deep-water forms like Cassidulina 

 subglobosa, Ehrenbergina pupa, E. serrata, and Cristellaria convergens ; and this leads 

 one to conclude that the deposit may have been formed at a depth certainly of about 

 100 fathoms, if not greater. 



Twenty-four species are here recorded, twelve of which have already been noted 

 from the sub-Antarctic islands of New Zealand. The species apparently new to this 

 area are Biloculina Icevis, Bulimina seminuda, Virgulina schreibersiana, V . subsquamosa, 

 Cassidulina parkeriana, Ehrenbergina pupa, Nodosaria (Glandulina) laevigata, N. (Gl.) 

 rotundata, Cristellaria convergens, Discorbina vesicularis, D. vilardeboana, and Nonionina 

 stelligera. 



DESCRIPTION OF THE FORAMINIFERA 



Family— MILIOLID^E 



Sub-Family — Miliolinin^e 



Genus — Bilocidina, d'Orbigny, 1826 



Biloculina depressa, d'Orbigny (Plate I, Figs, la, lb, 2, and 3) 



Biloculina depressa, d'Orbigny, 1826, Ann. Sci. Nat., vol. vii., p. 298, No. 7. 

 H. B. Brady, 1884, Rep. Chall, vol. ix, p. 145, PI. II, Figs. 12, 16, 17 ; PI. Ill, 



