F oraminif era of the Gault of Folkestone, By F. Chapman. 159 
The species here figured somewhat resembles Roemer’s F. ovata ; * 
but the latter differs from it in the contour of the shell, which is more 
regularly ovate, and it also has more numerous, narrower, and shorter 
chambers. F. perovata is found at Folkestone in zone ix., very rare ; 
zone xi., 50 ft. from the top, very rare ; 45 ft., very rare ; 12 ft., 
very rare. 
Frondicularia Cordai Reuss (plate IY. fig. 6). 
Frondicularia Cordai Reuss, 1844, Geogn. Skizzen aus Bohmen, 
vol. ii. p. 302. F. Cordai Reuss, 1845, Yerstein. bohru. Kreideform., 
pt. 1, p. 31, plate viii. figs. 26-28; plate xiii. fig. 41. 
This species is recorded from the Lower Planerkalk and Planer- 
mergel of Bohemia (Reuss) ; the Gault of Kent, the Chalk of Graves- 
end, and the Chalk-detritus of Charing (Rupert Jones in Morris’ 
Catalogue) ; and from the Phosphatic beds of Cambridge (G. R. Yine). 
At Folkestone it is found in zone ii., specimen b, very rare ; zone vii., 
very rare ; zone ix., very rare ; zone x., frequent ; zone xi., 55 ft. 
from the top, rare; 50 ft., very rare ; 45 ft., rare. 
Flabellina d’Orbigny [1826]. 
Flabellina didyma Berthelin sp. (plate IY. fig. 7). 
Frondicularia didyma Berthelin, 1880, Mem. Soc. Geol. France, 
ser. 3, vol. i. No. 5, p. 61, plate ii. fig. 18 a,b. 
This species, which has been described by Berthelin from the 
Gault of Montcley, is especially interesting since it has a very neat, 
inflated Cristellarian commencement, whilst from the third cham- 
ber the ordinary Frondicularian form of growth is assumed. It is 
perhaps one of the simplest and most striking forms of Flabellina 
known to us, and, if we except the irregular, acuminate Frondiculariw, 
the only species of the genus which is of Gault age. In the Chalk 
facies, however, Flabellina is prominent. In the Folkestone Gault 
this species is found in zone iii., very rare; zone v., very rare; 
zone vii., rare; zone ix., very rare; zone x., frequent; zone xi., 
55 ft. from the top, common ; 45 ft., frequent ; 35 ft., very rare ; 
25 ft., very rare ; 12 ft., rare ; 6 ft., rare. 
Rhabdogonium Reuss [I860]. 
Bhabdogonium tricarinatum d’Orbigny sp., var. acutangulum 
Reuss var. (plate IY. fig. 8 a, b). 
Bhabdogonium acutangulum Reuss, 1862, Sitzungsb. d. k. Ak. 
Wiss. Wien, vol. xlvi. p. 55, plate iv. fig. 14. B. tricarinatum Burrows, 
Sherborn and Bailey, 1890, Journ. Roy. Micr. Soc., p. 558, plate x. 
fig. 7 a , b. 
This variety is recorded from various strata in the Hils formation 
of North Germany (Reuss) ; and the Gault of France (Berthelin). 
* F. A. Roemer, ‘Die Verateinerungen des norddeutschen Kreid< gebirgea ’ 
(1840-1), p. 915, pi. xv. fig. 9. 
