110 FORAMINIFERA OF THE CRAG. 



(4) Spiroloculina bicarinata, d'Orb., 1826 (' Ann. Sci. Nat.,' vol. vii, p. 298, 

 No. 6), according to Terquem, 1882 (' Mem. Soc. Geol. France,' ser. 3, vol. ii, 

 art. 3, p. 155, pi. xxiv, fig. 5, after d'Orbigny's unedited drawings, pi. i, figs. 1 — 5), 

 is a neat, small, narrow, canaliculate form. 



It is evident from planulata and excavata having sometimes limbate sutures 

 and channelled margin, and canaliculata losing its marginal fluting and becoming 

 a flat-edged dorsata, that it is really artificial distinctions that separate the forms, 

 and that the leading character in each may be used in this arrangement. 



Occurrence. — Recent specimens of Spiroloculina canaliculata are not uncommon 

 in the Mediterranean in shallow and moderately deep waters. No specimens are 

 recorded from the ' Challenger ' dredgings. As a fossil, Sp. canaliculata, is 

 recorded from the Plaisancian beds of Piedmont, and from the Miocene of Vienna 

 and Malaga. In the Crag it has been found at Sutton. 



4. Spiroloculina dorsata, Beuss, 1866. Woodcuts, figs. 4 and 8a, 8b. 



Spiroloculina cretacea, Beuss, 1854. Denksch. k. Akad. Wien, vol. vii, Abth. 1, 



p. 72, pi. xxvi, fig. 9. 

 limbata, Bornemann, 1855. Zeitsch. Deutsch. Geol. Gesell., 



vol. vii, p. 348, pi. xix, fig. 1. 

 — depeessa, Williamson, 1857. Rec. Brit. Foram., p. 82, pi. vii, 



fig. 177. A variety, not square 

 and flat, but angular at tbe 

 periphery, 

 var. cymbium, Williamson, 1857. Ibid., p. 82, pi. vii, 



fig. 179. 

 limbata, Beuss, 1863. Sitzungsb. k. Akad. Wiss. Wien, vol. xlviii, 



p. 64, pi viii, fig. 89. 

 Mobloti, Beuss, 1864. Denksch. k. Akad. Wiss. Wien, vol. xxiii, 



p. 6, pi. i, fig. 10. 

 Miliola (Spiroloculina) limbata, Parker and Jones, 1865. Phil. Trans., vol. civ, 



p. 409, pi. xvii, fig. 83. (Periphery not 

 quite square, but slightly concave.) 

 Spiholoculina loesata, Beuss, 1866. Denksch. k. Akad. Wien, vol. xxv, p. 123. 

 " cf'r. limbata, Bornemann,' , Hantken, 1875. Mitth. Jahrb. k. 



Ungar. Geol. Anstalt, vol. iv, 

 p. 20, pi. xiii, fig. 2. 

 depressa, Terquem, 1875. Anim. plage Dunkerque, p. 38, pi. v, 



fig. 18. 

 [MPRESSA, Terquem, 1878. Mem. Soc. Geol. Fr., ser. 3, vol. ii, 



art. 3, p. 53, pi. x, fig. 8. 

 ltmbata, Brad;/, 1884. Rep. ' Chall.,' p. 150, pi. ix, figs. 15—17. 



