310 FORAMINIFERA OF THE CRAG. 



Tbuncatultna vaeiabilis, Woodward, 1885. Journ. N. York Micr. Soc, vol. i, 



p. 151. 



— — Milieu, 1886. Trans. Geol. Soc. Cornwall, vol. x, 



p. 226. 



— — B., P., and J., 1888. Tr. Zool. Soc, vol. xii, pt. 7, 



p. 227, pi. xlv, fig. 17. 



— — Terrigi, 1889. Mem. Ace. Lincei, ser. 4, vol. vi, 



p. 116, pi. vii, figs. 8, 9. 



— — B., S., and B., 1890. Journ. E. Micr. Soc, p. 562, 



pi. xi, fig. 22. 



— — Chapman, 1892. Quart. Journ. Geol. Soc, vol. xlviii, 



p. 517 ; and vol. 1, 1894, p. 721. 



— — Effffer, 1893. Abhandl. k. Bayer. Ak. Wisa., vol. 



xviii, pt. 2, p. 404, pi. xvi, figs. 57 

 —59, 63, 64. 

 Planoebulina variabilis. Goes, 1894. K. Svensk. Vet.-Akad. Handl., vol. xxv. 



No. 9, p. 88. 

 Truncatulina lobatula, var. variabilis, De Amicis, 1895. Nat. Sicil., Ann. 



xiv, p. 52. 



— variabilis, Fornasini, 1896. Rivista Italiana di Paleontologia, 



fasc. di Aprile, 1890, pp. 1 — 5, and fig. 

 (= Costa's Trimc. innormalis). 



Character. — In shell-structure similar to Truncatulina lobatula, but losing its 

 relatively spiral arrangement in a wild-growing irregularity of the chambers in an 

 apparently infinite variety of forms. 



Occurrence. — This varietal form of T. lobatula has a geographical and bathy- 

 metrical range corresponding with the type. Its earliest recorded appearance as 

 a fossil is from the Neocomian (Bargate beds of Surrey) ; it has also been found 

 in the Gault, the Red Chalk, the Phosphatic Chalk of Taplow ; the Miocene of 

 Bavaria and Muddy Creek (Victoria), the Pliocene of Italy and St. Erth. In the 

 Coralline Crag it is found somewhat rarely in every zone we have examined. 



4. Tetjncatulina Haidingeei {(TOrbigny), 1846. Plate IV, fig. 18. 

 Part I, 1866, Appendices I and II, Tables, No. 80. 



(?) EoTALiA PBOPiNQTJA (voTi Munst.), Bomev, 1838. Neues Jahrb. flir Min., &c., 



p. 389, pi. iii, fig. 54. 

 EoTALiNA Haidingeri, d'OrUguy, 1846. For. Foss. Vien., p. 154, -pi. viii, figs. 



7—9. 

 — EHRENBEUC4II, Baili), 1851. Smithsonian Contrib., vol. ii, art. 3, p. 10, 



figs. 11—13. 



