Foraminifera of the Gault of Folkestone. By F. Chapman. 155 
French Gault ; and in the Gault of Folkestone it was found at one 
horizon only, zone vii., one specimen. 
Frondicularia denticulocarinata (plate III. fig. 4 a, b). 
Shell elongate ; somewhat compressed, but swollen interruptedly 
along the central axis ; sides denticulo-carinate. The shell tapers 
slightly towards the aboral end, and consists of from six to nine 
chambers, denticulate at their extremities ; the sutural lines arched, 
and the chambers impressed in the lower third, above which is an 
inflated portion. The primordial chamber is spheroidal, and the earlier 
segments are greater in breadth than height, but rapidly become equal ; 
the aperture a simple slit. Length of the longest specimen 1/33 in. 
This elegant form wa3 found in the Gault of Folkestone in zone x., 
very rare ; zone xi., 55 ft. from the top, very rare ; 40 ft., very rare ; 
35 ft., very rare. 
Frondicularia Archiaciana d’Orbigny (plate III. fig. 6). 
Frondicularia Archiaciana d’Orbigny, 1840, Mem. Soc. Geol., 
France, vol. iv. p. 20, plate i. figs. 34-6. F. Archiaciana Eeuss, 
1845, Verstein. bohm. Kreidef., pt. i. p. 31, plate xiii. fig. 29. 
F. Archiaciana Burrows, Sherborn and Bailey, 1890, Journ. Roy. 
Micr. Soc., p. 558, plate X. fig. 6 a, b. 
The Folkestone specimen resembles more closely Reuss’s figure 
than d’Orbigny ’s, as the former has striations on the shell-surface. 
This species has been recorded from the Chalk of Meudon, &c. 
(d’Orbigny) ; the Chalk of Kent and Chalk-detritus of Charing 
(Rupert Jones) ; the Chalk of the North of Ireland (Wright); the 
Chalk of Bohemia and Westphalia (Reuss) ; and from the Red Chalk 
of Speeton (Burrows, Sherborn and Bailey). In the Folkestone 
Gault, zone i., specimen b, one specimen. 
Frondicularia gaultina Reuss (plate III. fig. 7). 
Frondicularia gaultina Reuss, 1860, Sitzungsb. d. k. Ak. Wiss. 
Wien, vol. xl. p. 194, plate v. fig. 5. F. gaultina Burrows, Sherborn 
and Bailey, 1890, Journ. Roy. Micr. Soc., p. 558, plate X. fig. 5. 
This species is occasionally met with in the Folkestone Gault, but 
is by no means common. It was found by Reuss in the Mimimus- 
clay of the Rhine ; it also occurs in the Red Chalk of Speeton 
(Burrows, Sherborn and Bailey). It is found in the Gault in zone i., 
specimen a, very rare ; zone v., very rare ; zone x., rare. 
Frondicularia inversa Reuss (plate III. fig. 8). 
Frondicularia inversa Reuss, 1845, Yerstein. bohm. Kreidef., 
pt. i. p. 31, plate viii. figs. 15-19 ; plate xiii. fig. 42. 
The Folkestone specimens resemble the broader figures of Reuss’s 
species, and the form is very confined in its range in the Gault. It 
has been found in the Bohemian Chalk (Reuss) ; the Chalk -Marl of 
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