Foraminifera of the Gault of Folkestone. By F. Chapman. 757 
In the Gault are innumerable examples of a tiny vitreous-slielled 
Foraminifer, which appear more closely related to Reuss’s specimens 
from the Bohemian Chalk (as has been pointed out by M. Berthelin 
in his description of similar forms from the Gault of Montcley), than 
to the recent forms with a sandy test, described under the name of 
Verneuilina polystropha (Parker, Jones, and Brady). The Gault 
specimens have an abnormal Bulimine oral aperture, somewhat semi- 
circular in outline, but their relation to the Buliminse appears to be 
established by the presence of some fine radiating striae round the 
aperture. This very minute form, one of the smallest in the Gault 
series, and found only in the finest siftings, occurs in zone xi., 55 ft. 
from the top, very rare ; 50 ft., rare ; 45 ft., common ; 40 ft., common ; 
35 ft., common ; 30 ft., common ; 25 ft., common ; 20 ft., very 
common ; 12 ft., very common ; 6 ft., frequent. 
Bolivina d’Orbigny [1839]. 
Bolivina textularioides Reuss, plate XII. fig. 12 a, h. 
Bolivina textularioides , Reuss, 1862, Sitzungsb. k. Ak. Wiss. 
Wien, vol. xlvi. p. 81, plate x. fig. 1. 
This form has been found in the Middle Hils] formation of North 
Germany (Reuss); in the Red Chalk of Speeton (Burrows, Sherborn, 
and Bailey); in the Gault of the North of France (Berthelin) ; and 
as a recent form both in shallow and deep water (Brady). It is a 
very characteristic form found generally distributed throughout the 
Gault. It occurs in zone i., specimen b, common ; zone ii., specimen 
a, very common ; zone ii., specimen b , frequent; zone ii., specimen e, 
frequent ; zone iii., common ; zone iv., frequent ; zone v., rare ; 
zone ix., frequent ; zoue x., rare ; zone xi., 50 ft. from the top, 
frequent ; 45 ft., common ; 40 ft., common ; 35 ft., frequent ; 30 ft., 
frequent; 25 ft., frequent; 20 ft., very common; 12 ft., common; 
6 ft., frequent. 
Pleubostomella Reuss [I860]. 
Pleurostomella obtusa Berthelin, plate XII. fig. 13 a, b. 
Fleur ostomella obtusa Berthelin, 1880, Mem. Soc. geol. France, 
ser. 3, vol. i. No. 5, p. 29, plate i. fig. 9 a , b. 
One of the forms of Pleurostomella found in the Folkestone 
Gault agrees with the figures given by M. Berthelin, and differs 
from the Chalk specimens figured by Reuss in some apparently 
essential points. Some specimens described under the name of P. 
subnodosa Reuss, have been noted by Messrs. Burrows, Sherborn, and 
Bailey from the Red Chalk of Speeton, which closely approach the 
Gault species. P. obtusa is found in the Gault in zone i., specimen b , 
frequent ; zone ii., specimen a, very rare ; zone ii., specimen b, very 
rare ; zone v., frequent ; zone viii., very rare ; zone xi., 50 ft. from 
the top, very rare ; 45 ft., rare ; 40 ft., very rare ; 30 ft., very rare ; 
25 ft., frequent ; 20 ft., common ; 12 ft., frequent. 
