ROT ALT A CALCAR. 



333 



Occurrence. — Rotalia orbicularis appears to be a moderately deep-water form. 

 The depths recorded for the species in the ' Challenger ' Report range from 100 

 to 2400 fathoms, and the 'Gazelle' records extend from 194 to 2991 fathoms. 

 Most of the specimens were taken from moderate depths. The geographical 

 range is extensive, but apparently does not extend to the Arctic or Antarctic 



regions. 



It has been recorded as a fossil from the Eocene (London Clay and Calcaire 

 Grossier) ; from the Miocene of Italy and Malaga; from the Pliocene of Italy and 

 Antwerp, and the Pleistocene of Norway and Scotland (Kintyre). In the Coralline 

 Crag we have found it sparingly in nearly every zone examined. 



j§ Figs. 24a, 24 5. — Rotalia orbicularis, d'Orbigny. From the 'Trans. Linn. 

 Soc.,' vol. xxiv, pi. xlviii, figs. 16 a, b. x 100 diaui. 



Pig. 24 5. 



Fig. 24 a. 



3. Rotalia oalcar (d'Orbigny), 1826. 



Plate II, figs. 16 — 18 (Calcarina rari- 

 spina). 



Part I, 1866, Appendices I and II (Calcarina rarispina), Tables, No. 90. 



Calcaeina calcar, d'Orbigny, 1826. Ann. Sci. Nat., vol. vii, p. 276, No. 1 ; 



Modele, No. 34. 

 Eotalia armata, d'Orb., 1826. Ibid., p. 273, No. 22 ; Modele, No. 70. 

 Calcarina rarispina, Deshayes, 1833. In Lyell's Principles of Geology, vol. iii, 



p. 251, pi. iv, figs. 9—11. 



— calcar, d'Orb., 1839. Foram. Cuba, p. 93, pi. v, figs. 22—24. 



— rarispina, Brown, 1843. Elem. Foss. Conch., p. 25, pi. ii, figs. 45,46. 

 Eotalia (Calcarina) rarispina, Jones and Parker, 1860. Quart. Journ. Geol. 



Soc, vol. xvi, p. 302, No. 124, Tables. 

 Calcarina calcar, Carpenter, 1862. Introd. Foram., p. 223, pi. xiii, fig. 21. 



— Spengleri, Parker, Jones, and Brady, 1865. Ann. Mag. Nat. Hist., 



ser. 3, vol. xvi, p. 24, pi. iii, fig. 87. 



— armata, Parker, Jones, and Brady, 1865. Ibid., p. 30, pi. iii, fig. 88. 



— rahispina, Jones, Parker, and Brady, 1866. Monogr. Foram. Crag, 



Appendices, No. 90, pi. ii, figs. 16 — 18. 

 Rotalina armata, Terquem, 1882. Mem. Soc. Geol. France, ser. 3, vol. ii, Mem. 



Ill, p. 67, pi. v (xiii), figs. 14, 15. 



