126 PORAMINIFERA OF THE CRAG. 



SpiROLOCULiNA PANDA, var. Eengeeeiana, Deeche, 1886. Mem. Soc. Emul. 



Montbeliard, ser. 3, vol. xvi,p. 16, 

 pi. i, fig. 28. 



SiGMOiLiNA TENUIS, Sclilumherger, 1887. Bullet. Soc. Zool. Fr., vol. xii, p. 117. 



Spieoloctjlina tenuis, Burrows, Sherhorn, and Bailey, 1890. Journ. Eoy. Microsc. 



Soc, for 1890, p. 551, pi. viii,fig8.2— 4. 



— -De Amicis, 1893. Boll. Soc. Geol. Ital., vol. xii, pp. 22, 



178, 179, 312. 



— — ^gger, 1893. Abhandl. k. Bayer. Akad. Wiss., vol. sviii, 



p. 222, pi. i, figs. 46, 47. 



Characters. — Thin, nearly complanate, but somewhat curved or twisted on 

 itself. 



Occurrence. — Sigmoilina tenuis has a very wide geographical range, and is 

 found in shallow waters and at all depths down to nearly 3000 fathoms. Fossil 

 specimens have been obtained from the Red Chalk of Speeton, the Oligocene of 

 Blsass, the Miocene of the Vienna Basin and of Italy, the Pliocene of Italy and 

 G-arrucha, and the Diestian of Antwerp. The Crag specimens were obtained 

 from Sutton, zone e, and from Sudbourne. 



Suh-family 3 . — PENEROPLiDiNiE. 



General Characters. — Planospiral or cyclical, sometimes crozier-shaped ; bilate- 

 rally symmetrical. 



Genus 1. — Cornuspira, Schlutze, 1854. 



Brady's Report ' Challenger,' 1884, jjjj. 62 a7id 198. 



Part I, 1866, page 1 ; and Appendix II, Table, Nos. 1 & 2. 



General Characters. — A planospiral undivided tube. 



Of the several forms referable to Cornuspira, the following may be accepted as 

 recognisable " species," according to the relative ividth and involution of the ivhorls. 



Figs. 10a, 104. — The outer whorl very wide (typical) ; inner whorls many 

 .ind thin. Cormtspira foliacea (Philippi), 1844. 



