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Transactions of the Society. 
transparency, this form has the appearance of a textularian, and 
occasionally (see fig. 20) resembles closely Reuss’s Polymorphina sub- 
rhombica (SB. k. Ak. Wiss. Wien, xliv. 1861, p. 339, plate vii. 
fig. 3), from the Senonian of New Jersey, in general shape and 
appearance. It is likely, too, that Marsson’s Bolivina tenuis (Mitth. 
Nat. Ver. Neu-Vorpommern u. Riigen, x. 1878, p. 126, plate iii. 
fig. 23 b) is this form, as also B. tenuis Marss. as figured by 
Tutkovskii (Zap. Kievsk. Obsch. Estest., vii. 1887, p. 350, plate 
viii. fig. T),for both these figures were drawn from balsam-mounted 
specimens, in which medium false appearances are very apt to occur. 
Spiroplecta Ehrenberg, 1844. 
Spiroplecta biformis (Parker & Jones), plate VIII. fig. 21. Textu- 
laria agglutinans v. biformis, Parker A Jones, Phil. Trans., 1865, 
p. 370, plate xv. figs. 23, 24 ; S. biformis, Brady, Rep. Challenger, 
ix. 1884, p. 377, plate xlv. figs. 25-27. — A few examples have 
been met with in Mr. Bailey’s preparations. Parker and Jones record 
it from the Gault and Chalk in their paper quoted above ; the species 
occurs also in a section of Red Chalk from Speeton, and in another of 
Gault from Roydon, both in Mr. W. Hill’s collection. 
Gaudryina d’Orbigny, 1840. 
Gaudryina pupoides d’Orb., plate VIII. fig. 22. D’Orbigny, Mem. 
Soc. Geol. France, iv. 1840, p. 44, plate iv. figs. 22-24 ; Brady, Rep. 
Challenger, ix. 1884, p. 378, plate xlvi. fig. 2. — One large individual, 
Burrows Coll. 
Bulimina d’Orbigny, 1826. 
Bulimina a finis d’Orb., plate VIII. fig. 23. D’Orbigny in De la 
Sagra’s Hist, lie Cuba, 1839, p. 105, plate ii. figs. 25, 26; Brady, 
Rep. Challenger, ix. 1884, p. 400, plate 1. figs. 14 a, b. — Common in 
Mr. Bailey’s preparations. From its minute size, it has probably 
escaped observation when searching dry material from the same and 
other localities. 
B. Presli Reuss, plate VIII. fig. 24. Reuss, Verst, bohm. Kreide, 
part i. 1845, p. 38, plate xiii. fig. 72, and Haidinger’s Nat. Abh., 
iv. (i.) 1851, p. 39, plate iii. fig. 10. — One of the most common forms 
in the red chalk as in other cretaceous deposits, occurring often of a 
considerable size. 
Bolivina d’Orbigny, 1839. 
Bolivina textularioides Reuss, plate VIII. fig. 23. Reuss, SB. k. 
Ak. Wiss. Wien, xlvi. (i.), 1862 (1863), p. 81, plate x. figs. 1 a, b . — 
Abundant but small in Mr. Bailey’s slides. Described by Reuss from 
the middle Hils-Thon of north-west Germany. 
B. Beyrichi Reuss, plate VIII. fig. 26. Reuss, Zeitschr. deutsch. 
