28 REPORT ON FORAMINIFERA AND OSTRACODA 



Figs. 1, 2. Schlumberger, 1891, Mem. Soc. Geol. France, vol. iv, p. 547, PI. IX, 

 Figs. 48, 49 ; woodcuts, Figs. 1-5. Chapman, 1907, Joum. Linn. Soc. Lond., Zool., 

 vol. xxx, p. 14, PI. I, Fig. 16. Idem, 1909, Sub-Antarctic Islands of New Zealand, 

 vol. i, art. xv, p. 313. 



This species is the most abundant of the Biloculince in the present material. 

 A feature of some of the tests is the notching of the carina, but they are not regularly 

 serrated as in B. serrata. Others show a transition into B. Icevis by the salient 

 character of the carina of the penultimate chamber. 



B. depressa is a widely distributed form, and is apparently unrestricted as to 

 depth. Sir John Murray gives the bathymetrical range as shore to 3000 fathoms. 



Fossil examples, of smaller size than usual, are found in the Tertiary (Balcombian 

 and Kalimnan) beds of Victoria. 



Biloculina Icevis, Defrance, sp. (Plate I, Fig. 4) 



Pyrgo Icevis, Defrance, 1824, Diet. Sci. Nat., vol. xxxii, p. 273 ; Atlas, 

 PI. LXXXVIII, Fig. 2. Biloculina Icevis, Defr., sp. H. B. Brady, 1884, Rep. 

 Chall., vol. ix, p. 146, PL II, Figs. 13, 14. Goes, 1894, Kongl. Svenska Vetenskaps 

 Akad. Handl., vol. xxv, p. 119, PL XXIV, Figs. 914-918. Chapman, 1907, Joum. 

 Linn. Soc. Lond., Zool., vol. xxx, p. 14, PL I, Fig. 15. 



Typical specimens are rare in the present series. B. Icevis has been recorded by 

 the Challenger from two stations in the N. Atlantic at 390 and 1215 fathoms, and in 

 shallow water from Papua. 



It is well known as a Tertiary fossil, and has been noted from the southern 

 hemisphere in the Port Phillip Tertiaries (Balcombian series) by the writer. 



Biloculina sarsi, Schlumberger (Plate I, Figs. 5a, 5b) 



Biloculina sarsi, Schlumberger, 1891, Mem. Soc. Zool. France, vol. iv, p. 553, 

 PL IX, Figs. 55-59 ; woodcuts, Figs. 10-12. Chapman, 1907, Joum. Linn. Soc. 

 Lond., Zool., vol. xxx, p. 14, PL I, Figs. 1, 2. Idem, 1909, Sub-Antarctic Islands of 

 New Zealand, vol. i, art. xv, p. 314, PL XIII, Fig. 3. 



As previously noticed, this species occurs in the " Biloculina Clay " of the North 

 Sea, in material obtained at a depth of 2000 fathoms. M. Schlumberger, in describing 

 the species, states it to be there very abundant. 



So far as we know at present, B. sarsi first appeared in the southern hemisphere ; 

 for it occurs in the Tertiary beds of Upper Oligocene or Lower Miocene age (Balcombian) 

 of Port Phillip, Victoria. The fossil shells do not attain such large proportions as the 

 living or subrecent examples. 



Biloculina elongata, d'Orbigny (Plate II, Fig. 6) 



Biloculina elongata, d'Orbigny, 1826, Ann. Sci. Nat., vol. vii, p. 298, No. 4. 

 H. B. Brady, 1884, Rep. Chall., vol. ix, p. 144, PL II, Figs. 9a, 96. Schlumberger, 

 1891, Mem. Soc. Zool. France, vol. iv, p. 553, PL XI, Figs. 87, 88 ; PL XII, Fig. 89 ; 

 woodcuts, Figs. 35, 36. Chapman, 1907, Joum. Linn. Soc. Lond., Zool., vol. xxx, 

 p. 15, PL I, Fig. 14. Idem, 1909, Sub-Antarctic Islands of New Zealand, vol. i, art. xv, 

 p. 317. 



The tests of this species are very variable in the present collection, but are distin- 

 guished from their congeners by the generally elongate form, the comparatively small, 



