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Transactions of the Society . 
character, have several representatives, but the genus is by no means- 
a strong one in the Gault. The species do not appear until zone iii. is 
reached, and after that are not confined to any particular part of the 
series. Truncatulina is sparingly represented by three species, first 
appearing in zone vii. The next genus, Anomalina , is somewhat difficult 
to separate into species. There appear to be three forms, of which 
A. amnonoides Reuss sp. is by far the commonest as well as the best 
distributed, being found in every sample examined. A. ammonoides is 
the only species of the Gault Foraminifera which occurs in every level 
from zones i. to xiii. The genus Pulvinulina comprises six species, the 
rarest of which, P. Hauerii d’Orb. sp., appears to be restricted to the 
Lower Gault. Concerning the remaining five species of Pulvinulinse — 
which by the way all possess the curious Epistomine aperture — the com- 
monest is P. spinulifera Reuss, of which that author says that it is “ die 
haufigste Species unter alien Foraminiferen des Gaults von Folkestone.” 
As far as these present studies go to prove, Globigerina cretacea is, how- 
ever, the most abundant species, sjteaking for the Gault generally,. 
Anomalina ammonoides following somewhat closely upon it.* The 
occurrence of Pulvinulina spinulifera is somewhat restricted, and ex- 
hibits a peculiarity of rise and fall in its development which has already 
been noted on p. 9. Potalia possesses only one form, P. Soldanii 
d’Orb. sp. var. nitida Reuss, which increases in abundance towards the 
top of the Gault. 
The Distribution of the Foraminifera in the Folkestone- Gault, compared 
with '.that of the larger fossils enumerated by Messrs. De Fiance 
and Price. 
The Gault has been divided at Folkestone by Messrs. De Ranee and 
Price into two great divisions, the Upper Gault and the Lower Gault, 
with a passage bed containing a limit fauna, and also one which is 
peculiar to the stratum. The zones of the Lower Gault are from i.-vii. 
(according to Mr. Price’s divisions), the passage bed viii. (zone of Am- 
monites cristatus or of Am. Beudanti, and the Upper Gault consisting 
of zones ix. (with the latest subdivisions mentioned on p. 17) -xiii. 
Mr. Price records 240 species of the larger fossils from the entire 
series of Gault strata. Out of these “ 124 forms [52 per cent.] become 
extinct in zone viii., and 39 forms [16 per cent.] are continued into the 
Upper Gault. Bed viii., besides containing the limit fauna, possesses 
as many as 18 species which are peculiar to it. 59 new forms [25 per 
cent.] occur in the Upper Gault, making their first appearance either 
in hio. viii. or in a higher zone.” 
With regard to the Foraminifera here recorded, of the 265 spp. and 
vars., 23 (9 per cent.) are restricted to the Lower Gault ; 148 forms 
(56 per cent.) are common to the Lower and Upper Gault ; whilst- 
94 forms (35 per cent.) are peculiar to the Upper Gault. 
* This latter species is the only one which I have found common to all the zones, 
and levels of the Gault at Copt Point. 
