BILOCULINA ELONGATA. 97 



BiLocuLiNA ELONGATA, Schlumberger , 1S91. Mem. Soc. Zool. Prance, vol. iv, 



p. 571, cuts 35, 36, pi. xi, figs. 87, 

 88 ; pi. xii, fig. 89. (Figs. 87— 

 89 make a near approach to 

 d'Orbigny's B. inornata, figs. 7 — 

 9, pi. xvi. For. Foss. Vien.) 



— -de Amicis, 1893. Boll. Soc. Geol. Ital., vol. xii, fasc. 3, 



— — pp. 308, 468, 469. 



— — Egger, l^Qii. Ahhandl. k. Bayer. Akad. Wiss., vol. xviii, 



Abtheil. ii, p. 220, pi. i, fig. 1. 



— — Ooes, 1894. K. Svensk. Akad. Handl., vol. xxv, No. 9, 



p. 119, pi. xxiv, figs. 906—913. 



Characters. — Biloculina elongata, may be grouped with B. ringens as a narrow 

 or contracted variety, subcylindrical or elongate-oval in sliape, with its aperture 

 more or less subcircular, and a somewhat modified epistomium. 



Occurrence. — This form has a wide geographical distribution. It appears 

 to be more common in the North Atlantic and South Pacific. In a fossil 

 condition it has been recorded from the Eocene of Paris (Terquem), from the 

 Miocene (?) of Muddy Creek, Victoria (Howchin),.and from the Plaisancian (Older 

 Pliocene) of Castellarquato. This species was recorded before only from the 

 Red Crag ; we now find it rarely, but of large size, in the pits of the Coralline 

 Crag at Sudbourne Hall and Broom Hill, both in Zone d. 



The following list is a classification of Biloculina elongata and its immediate 

 allies, drawn up with great care, and kindly supplied by F. W. Millett, Esq., 

 F.R.M.S. 



I. Biloculina elongata with exposed portion of penultimate chamber not pyriform. 



Frumentaria Ovtila, SoJdani, 1795. Testaceograph. vol. i, part 3, p. 228, pi. cliii, 



figs. M and Q. 

 Biloculina sacculus, Terquem, 1858. Mem. Ac. Imp. Metz, vol. xxxix, p. 636, 



pi. iv, fig. 15. 



— KiNGENS, Terquem, 1876. Foram. Dunkerque, p. 80, pi. x, fig. 21. 



— ELONGATA, Terquem, 1882. Mem. Soc. Geol. Fr., ser. 3, vol. ii, p. 154, 



pi. xxiv, fig. 1 (near hulloides). 

 _ _ Brady, 1884. Eept. ' Challenger,' p. 144, pi. ii, fig. 9. 



— — Goes, 1894. K. Svensk. Ak. Handl., vol. xxv, p. 119, 



pi. xxiv, figs. 910, 911. 



