FOUAMINIFERA— IIKHON-AI.LEN AM) ICAItLAM). 71 



Stations 1 (J, 18-20, 30. 



Occurs in botli areas, the best specimens off N.Z. At Station (i specimens 

 infiltrated witli glauconite occur. Tlie Antarctic specimens are. as rule, smaller 

 and less typical. 



52. Sii/iiioiIi)ia cdirardsi, Sclilumberger. 



I'Idiiispiiiiiii {Sif/iiioilii/d) nlininl.n, Sclilumberger, 1887, I', p. 483 (1 1.") in the r<'|)rint,), tcxt-fii;. 8, 



pi. vii, figs. 15-18. 

 >! .. „ Heron-Allen and EarUuid, lill-t, etc., FKA. 191.5, p. 584, 



jil. xlv. figs. 19-21. 

 Station 6. 



A single typical specimen. 



53. SigmoiliiKt miihonata, sp. nov. Plate I, Figs. 7, 8. 

 Stations 27, 31, 45, 47, 48. 53, 55. 



Test, free, minute, circular in outline with a raised central boss on each face. 

 Edge rounded. Aperture a minute slit. Surface smootli and polished, especially 

 oji the bosses. 



Dimensions :-- Breadth ^O-'SOmm. : thickness. •20 mm. 



This obscure little form, which occurs in some numbers at several Antarctic 

 Stations, presents features analogous to S. sifjmoidca, but differs in its circular 

 outline and the raised central bosses. The possibility of its representing the 

 initial stage of a large Miliolid must not be overlooked, but no specimens repre- 

 senting a transition between this and any Miliolid occurring at the same Station 

 have been observed. 



54. SigntoiUna sigmoidea (Brady). 



Plaiiispiriiin siqmoidea. Brady, 1884. FC. p. 197, pi. ii, figs. 1-.3, and p. 194, fia. lie. 



Heron-Allen and Earland, 1916, FWS. p. 216, pi. x.xxix, figs. 32-34. 



Stations 2, 3. G. 1(5. 38 ( + T. d. F.). 



One long, narrow specimen at Station 3, and a few, more typical, at Station 16. 

 At Stations 2, 3, 0, and 38, a few specimens which, though referable to this 

 species, are characterized by their minute size, and the breadth of shell, which 

 is almost equal to the length, giving a nearly circular outline. 



55. Sigmoilina celata (Costa). 



Spiroloculina celata, Costa, 1855, FFMV. p. 126. pi. i, fig. 14 ; 1853, etc., PRN 1856 ]A xxvi 



fig. 5. 

 Planispiriiin celata, Heron-Allen and Earland, 1916, FWS. p. 216. 



Stations 5-8, 10-12 (-fR. d. J.). 



Confined to the N.Z. area and best represented at Station 6. Both the broad 

 original type of Costa, figured by Schlumberger (S.. 1887, P., p. Ill, pi. vii, figs. 12-14). 

 and the long, narrow type figured by, Brady and named Sigmoilina schlumbergeri 

 by Silvestri (S... 1904, TB. p. 267) occur. At Station 10 the original type occurs 

 in very broad, outspreading form. 



