Foraminifera of the Gault of Folkestone. By F. Chapman. 5 
It is also of common occurrence throughout the Chalk formation, and 
is well known from many horizons of Tertiary age. 
As a recent form, A. ammonoides is found both in shallow and 
deep water. 
This species was found in the Gault of Folkestone in zone i., 
spec, a, very rare ; zone i., spec, h , common ; zone ii., spec, a , com- 
mon ; zone ii., spec, b, common ; zone ii., spec, e, common ; zone iii., 
common ; zone iv., common ; zone v., common ; zone vi., common ; 
zone vii., common ; zone viii., common ; zone ix., common ; zone x., 
common ; zone xi., 55 ft. from the top, frequent ; 50 ft., common ; 
45 ft., common ; 40 ft., common ; 35 ft., common ; 30 ft., very rare ; 
25 ft., common ; 20 ft., frequent ; 12 ft., common ; 6 ft., common. 
Anomalina rudis Keuss sp., plate I. figs. 6 a-c. 
Bosalina rudis Keuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, 
vol. xlvi. p. 87, pi. xi. figs. 7 a-c. Giimbel, 1868 (1870), Ahhandl. 
m.-ph. Cl. k. Bayer. Ak. Wiss., vol. x. p. 657, pi. ii. figs. 99 a-c. 
Anomalina rudis - Berthelin, 1880, Mem. Soc. Geol. France, ser. 3, 
vol. i. No. 5, p. 68, pi. iv. figs. 15 a-c. Hiscorbina inflata Perner, 
1892, Foraminifery Ceskeho Cenomanu (Palaeontographica Bohemiae, 
No. 1), p. 65, pi. x. figs. 4 a-c. 
A. rudis appears to he strictly confined to strata of Gault and 
Cenomanian ages. It has been recorded from the Gault of N. Ger- 
many (Keuss), and of France (Berthelin), and also from the Cenomanian 
of Bohemia (Perner). 
This species is characterised by its fewer and more inflated cham- 
bers as compared with A. ammonoides. It also closely approaches 
A. grosser ugosa Giimbel sp., but differs in being less equilateral than 
that species, and approximating towards the typical Truncatulinse by 
the flattening of the superior face of the test. The last chamber of 
A. rudis is often of large size, and greatly inflated. It is possible 
that this phenomenon has a connection with the fragile brood-chamber 
of the megalospheric form found in many types of the Foraminifera. 
From the Gault of Folkestone A. rudis was obtained as follows : 
Zone i., spec, b, frequent ; zone ii., spec, a, rare ; zone ii., spec, b, 
rare ; zone ii., spec, c, rare ; zone iii., frequent ; zone iv., frequent ; 
zone v., rare ; zone vi., frequent ; zone vii., rare ; zone ix., very rare ; 
zone x., rare ; zone xi., 20 ft. from the top, rare ; 12 ft., rare. 
P ulvinulin A Parker and Jones [1862]. 
Pulvinulina Hauerii d’Orbigny sp., plate I. figs. 7 a-c. 
Botalina Hauerii d’Oibigny, 1846, Foram. Foss. Vienne, p. 151, 
pi. vii. figs. 22-24. Pulvinulina Hauerii Parker and Jones, 1865, 
Phil. Trans., vol. civ. p. 393 ; Brady, 1884, Chall. Rep., vol. ix. p. 690, 
pi. cvi. figs. 6, 7. Pulvinulina ( Botalina ) Hauerii Egger, 1893, 
