FORAMINIPER A— HERON- ALLEN AND EARLAND. 61 



Sub-Family MILIOLININAE. 

 BILOCULINA, d'Orbigny. 

 7- Biloculina irregularis, d'Orbigny. 



Biloculina irregularis, d'Orbigny, 1839, FAM. p. 67, jil. viii, figs. 20, 21. 

 Horon-AUcn and Earland. lOKi. FWS. p. 206. 



Stations 2-4, G. 31, 38, 45. 46, 48, 53, 54. 



Attains its niaxinuun frequency and development in the N.Z. area at Station 0, 

 where a good range of specimens in all stages was obtained. In the Antarctic 

 material the specimens are, as a rule, few in number, but large and well developed 

 at several Stations, especially Stations 46 and 53. 



8. Biloculina sphaera, d'Orbigny. 



Biloculina sphcera, d'Orbigny, 1839. FAM. p. 66. pi. viii. figs. 1.3-16. 

 Brady," 1884, FC. p. Ul (fig.), pi. ii, fig! \,(. h. 



Stations 6, 26, 54. 



Sparingly represented in the X.Z. area l)y a fairly good series of specimens, 

 none attaining any considerable size. The Antarctic records show a few enormous 

 specimens characterised by extremely labyrinthic apertures. 



There is an increasing tendency to refer this species to tlie genus Planispirina, 

 on account of the arrangement of the earlier chambers, but it is so essentiallv 

 biloculine in external form that we prefer to retain the original nomenclature. 



9. Biloculina bulloides, d'Orbigny. 



Biloculina bulloides, d'Orbigny, 1826, TMC. p. 297, no. 1, pi. xvi, figs. 1-4, Modole no. 90. 

 Heron- Allen and Earland, 1914, etc., FKA. 1915, p. .5.51. 



Stations 1-3, 5, 6, 9, 16, 19, 36, 53-55 (+ E. d. J.). 



The specimens from the N.Z. area are rather small, the l)est and most 

 typical from Station 6. It is nowhere common. An abnormal individual with 

 an accessory chamber and tubular orifice over the aperture was found at 

 Station 2. In the deep water between N.Z. and the Antarctic circle the specimens 

 attain better growth, but they reach their maxinnim dimensions in S. Polar 

 waters, notaljly at Station 48, where very large individuals were found. At 

 Station 36 both typical specimens and specimens with projecting tubular apertures 

 {B. lucernula, Schwager, S, 1866, FKN, p. 202, pi. iv, fig. 17) were observed. 



10. BUoC'ulina ringens (Lamarck). 



Miliolites ringens, Lamarck, 1804, etc., AM. vol. v, p. 351, no. 1, vol. ix, pi. xvii, fig. 



Lamarck, 1816, etc., ASV. vol. vii, p. 612 : 18.35, etc., vol. xi, p. 289. no. 1. 

 BilomHiHt. „ Heron-Allen and Earland, 1915. FKA. p. 5-50. 



Stations 1, 6, "48. 



A good many specimens at Station 6 (N.Z.) large and typical, otherwise repre- 

 sented by single specimens of the depressed form figured by Brady (Fig. 7) and named 



