no FORAMINIFERA OF THE CRAG. 



(4) Spiroloculina bicaeinata, cVOrh., 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 excauata having sometimes limbate sutures 

 and channelled margin, and canalicidafa 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. Spibolocdlina dorsata, Beuss, 1866. Woodcuts, figs. 4 and 8a, 8b. 



Spieoloculina ceetacea, Beuss, 1854. Denksch. k. Akad. Wien, vol. vii, Abth. 1, 



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



— LiMEATA, Bornemann, 1855. Zeitsch. Deutsch. Geol. Gesell., 



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



— DEPEESSA, Williamson, 1857. Kec. Brit. Foratn., p. 82, pi. vii, 



fig. 177. A variety, not square 

 and flat, but angular at the 

 periphery. 



— — var. CYMBIUM, Williamson, 1857. Ibid., p. 82, pi. vii, 



fig. 179. 



— LIMEATA, Reuss, 1863. Sitzungsb. k. Akad. Wiss. Wien, vol. xlviii, 



p. 64, pi. viii, fig. 89. 



— MoELOTi, iieMM, 1864. Denksch. k. Akad. Wiss. Wien, vol xxiii, 



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



MiLiOLA (Spieoloculina) limbata, Parker and Jones, 1865. Phil. Trans., vol. civ, 



p. 409, pi. xvii, fig. S3. (Periphery not 

 quite square, but slightly concave.) 



Spieoloculina doesata, Reuss, 1866. Denksch. k. Akad. Wien, vol. xxv, p. 123. 



— " cfr. LIMBATA, Bornemann," Hantken, 1875. Mitth. Jahrb. k. 



Ungar. Geol. Anetalt, vol. iv, 

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



— DEPEESSA, Terquem, 1875. Anim. plage Dunkerque, p. 38, pi. v, 



fig. 18. 



— iMPEESSA, Terquem, 1878.. Mem. Soc. Geol. Fr., ser. 3, vol. ii, 



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



— LIMBATA, Brady, 1884. Rep. ' Chall.,' p. 150, pi. ix, figs. 15 — 17. 



