Foraminifera of the Gault of Folkestone. By F. Chapman. 15 
at the surface of attachment. The second test is turned through 
90 degrees in relation to the earlier portion, the narrow back of the 
latter being opposed to the lateral surface of the former. 
Both specimens were found in zone x. at Folkestone. 
Subfamily POL YMOBPHININM. 
Sagrina ( Sagrina ) d’Orbigny [1839] ; emend. Parker and Jones 
[1865]. 
Sagrina calcarata Berthelin sp., plate II. figs. 14 a, b. 
Bigenerina calcarata Berthelin, 1880, Mem. Soc. Geol. France, 
ser. 3, vol. i. No. 5, p. 27, pi. i. figs. 14a-16 ; pi. ii. figs. 2 a, b. 
This elegant little species is not very common, but it occurs in the 
finest washings from several zones in the Gault of Folkestone. The 
species approaches Sagrina virgula of Dr. H. B. Brady * in certain 
points ; it is, however, distinct from that form in the character of the 
commencement, which in S. calcarata is biserial, whilst S. virgula 
has the early chamber usually irregularly arranged and sometimes 
spiral. 
M. Berthelin obtained ’ his specimens from the Gault of Wissant 
and Montcley. 
S. calcarata occurs at Folkestone in zone xi., 50 ft. from the top, 
frequent ; 40 ft., very rare ; 30 ft., rare ; 25 ft., very rare ; 12 ft., very 
rare. 
Family EOTALIID.E. 
Sub-family B 0 TA L IINJE. 
Discorbina Parker and Jones [1862]. 
Bosalina Vilardeboana d’Orbigny 1839, Foram. Amer. Merid., 
p. 44, pi. vi. figs. 13-15. Discorbina Vilardeboana Parker and 
Jones, 1872, Quart. Journ. Geol. Soc., vol. xxviii. p. 115. Brady, 
1884, Chalk* Rep., vol. ix. p. 645, pi. lxxxvi. figs. 9, 12 ; pi. lxxxviii. 
fig. 2. Chapman, 1894, Quart. Journ. Geol. Soc., vol. 1. p. 721. 
The specimen from the Gault is not very typical nor well 
developed, but appears to come nearest to the above species. It is 
always found in shallow water deposits at the present day. As a fossil 
it has occurred in the Lower Greensand (Bargate Pebble beds) of 
Surrey. 
The specimen found in the Gault at Folkestone was from zone iii. 
* Chall. Rep., vol. ix. 1SS4, p. 5S?, pi. lxxvi. figs. 4-10. 
