590 
Transactions of the Society. 
Family ROTALIIDJE. 
Sul-family SPIRILLININ.E. 
Spirillina Ehrenberg [1841]. 
Spirillina tuberculata Brady, plate XIII. fig. 9. 
Spirillina tuberculata Brady, 1878 (in Siddall’s Foraminifera of 
the Dee), Proc. Chester Soc. Nat. Sci., part ii. p. 50. Id., 1879, 
Quart. Journ. Micr. Sci., vol. xix. N.S., p. 279, plate viii. figs. 28 a, b. 
Id., 1884, Chall. Rep., vol. ix. p. 631, pi. lxxxv. figs. 12-16. 
This interesting little Foraminifer, of which only a single specimen 
was found in the Gault washings, agrees very exactly with the defini- 
tion of the species as given by H. B. Brady. In the Gault specimen, 
as in the recent ones, the exogenous tubercular growth tends to fill 
up the sutural lines with the exception of that of the last whorl. 
The tubercles are scattered irregularly over the surface of the test, 
in which feature it differs materially from Williamson’s S. mar gar i- 
tifera * 
S. tuberculata has been found in the fossil condition in the Tertiary 
Deposits of Muddy Creek, Victoria (Howchin). The species is essen- 
tially a shallow-water form in recent deposits. 
This species was found in the Gault of Folkestone in zone viii., 
very rare. 
Sub-family ROTALIINJE. 
Discorbina Parker and Jones [1862]. 
Discorbina rugosa d’Orbigny sp., plate XIII. figs. 10 a-c. 
Rosalina rugosa d’Orbigny, 1839, Foram. Amer. Merid., p. 42, 
plate iii. figs. 12-14. Discorbina rugosa Brady, 1884, Chall. Rep., 
vol. ix. p. 652, plate lxxxvii. figs. 3 a-c ; plate xci. figs. 4 a-c. Sher- 
born and Chapman, 1889, Journ. Roy. Micr. Soc., p. 487, plats xi. 
fig. 33. Chapman, 1894, Quart. Journ. Geol. Soc., vol. 1. p. 720. 
As a recent form Discorbina rugosa affects moderately shallow 
water. The recorded occurrences for this species as a fossil are, the 
Neocomian beds of Surrey (Chapman) ; and the London clay (of 
Piccadilly — Sherborn and Chapman) (and of Cannon Street — Sherborn 
and Burrows).f 
This species was found in the Gault in zone iii., very rare ; zone 
v., very rare ; zone xi., 55 ft. from the top, frequent ; 50 ft., very rare ; 
45 ft., very rare ; 35 ft., very rare ; 20 ft., rare ; 12 ft., very rare. 
Discorbina globularis d’Orbigny sp., plate XIII. figs. 11 a-c. 
Rosalina globularis d’Orbigny, 1826, Ann. Sci. Nat., vol. vii. 
p. 271, plate xiii. figs. 1-4 ; — Modele, No. 69. Discorbina globularis 
Brady, 1884, Chall. Rep., vol. ix. p. 643, plate lxxxvi. figs. 8 
* ‘Recent Foraminifera of Great Britain,’ 1858, p. 93, pi. vii. fig. 204. 
f Proc. Geol. Assoc., xii. (1891) p. 6. 
