Foraminifera of the Gault of Folkestone. Bg F. Chapman. 7 
wall of the terminal chamber.” * * * § The Gault specimens exhibit this 
peculiarity in nearly every specimen examined, but owing to the 
infilling of the aperture it is sometimes at first difficult to discover. 
With regard to this secondary aperture, in most examples it is seen 
that only in the last chamber does it remain open, the earlier ones 
being closed over by the growth of the shell wall. The transparency 
of the shell, however, allows one to trace these slits round an entire 
whorl, appearing as a covered and interrupted channel immediately 
below the periphery. This peculiar feature in the apertural character 
of the shell has been especially noticed by Terquem, who instituted the 
genus Epistomina for this type ; f by Uhlig, who found numerous 
specimens with the same characters in the Ornatus- clays of Russia 
(see references in synonymy of this and the succeeding species) ; and 
by Rzehak, who records it from the Oligocene limestones of Nieder- 
hollabrunn, Lower Austria.!; 
Pulvinulina elegans has been recorded from many formations, 
beginning with the Lias. The figures, however, which are given by 
Jones and Parker in their Chellaston paper § appear to belong more 
properly to P. caracolla, which is also of frequent occurrence in 
Jurassic strata. The species has been noted from the Lower Green- 
sand of Surrey, and although apparently unrecorded previously from 
beds of Gault age, it has been noticed at various horizons in the Chalk, 
and it is also a well-known fossil in many Tertiary formations. 
As a recent form P. elegans is unrestricted as to depth, and passes 
from the typical form in moderately shallow water to the deep-water 
variety with a thickened test, known as P. Partschiana d’Orbigny sp. 
Pulvinulina elegans was found in the Gault of Folkestone in 
zone i., spec, b, rare ; zone ii., spec, a, frequent ; zone ii., spec, b, fre- 
quent ; zone ii., spec, c, rare ; zone iii., frequent ; zone iv., rare ; zone v., 
frequent ; zone vi., very rare ; zone vii., rare ; zone ix., frequent ; 
zone x., 55 ft. from the top, very rare ; 20 ft., very rare. 
Pulvinulina caracolla Romer sp., plate I. figs. 9 a-c. 
Gyroiclina caracolla Romer, 1840-41, Verstein. Norddeutsch. 
Kreide, p. 97, pi. xv. fig. 22. Rotalia elegans Jones and Parker, 1860, 
Quart. J ourn. Geol. Soc., vol. xvi. pp. 452, 455, and 457, pi. xx. fig. 46. 
B. caracolla Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi. 
Abth. i. p. 84, pi. x. figs. 6 a-c. Pulvinula caracolla Crick and 
Sherborn, 1892, Journ. Northampton Nat. Hist. Soc., vol. vii. p. 71, 
pi. vii. (ii.) figs. 26 a-c. 
* H. B. Brady, Chall. Rep., vol. ix. pp. 700, 701. 
f Bull. Soc. Geol. France, ser. 3, vol. xi. 1883, p. 37, pi. iii. figs.wl-20. Also 
Terquem, Cinquieme Me'm. Foram. Oolithique, 1883, p. 373. 
X Seguenza figures an undoubted EpistominaAike Pulvinulina allied to P. reti- 
culata Reuss sp. from the Tertiaries of Calabria under the name of Discorbina vestita 
Atti R. Accad. Lincei, ser. 3, vol. vi. 1880, p. 118, pi. xiii. fig. 39. 
§ Quart. Journ. Geol. Soc., vol. xvi. (1860) pi. xx. fig. 46. 
