Foraminifera of the Gault of Folkestone. By F. Chapman. 567 
Rose * and Professor Kolliker.f These minute borings are not 
cod fined to any one stratum, but are well distributed throughout the 
whole of the Gault. The finest washings J consist of glauconite, 
angular quartz-£rains, and Anomalina ammonoides Rss. sp. 
Zone I., specimen h. From the level of 5 ft. above the base of 
the Gault. A greenish-grey clay, splashed with lighter markings. 
The proportion of sandy and shelly material remaining after washing 
is 1^ per cent. The organisms are all very small. The washed 
material consists of glauconite, prisms of Inoceramus, fragments of 
Nucula and other testacea, spines of Hemiaster. numerous Ostracoda,§ 
Foraminifera, and fish remains. The fine washings consist of glau- 
conite grains, angular quartz-grains, and prisms of Inoceramus ; also 
Bolivina textularioides Rss. (generally filled with glauconite), very 
common; Ramulina sp., very rare; Globigerina cretacea d’Orb., very 
common ; and Anomalina ammonoides Rss. sp., very common. The 
rotaline forms throughout the Gault are in very many cases filled 
with carbonate of lime, and each chamber of the shell shows a black 
cross between crossed nicols. 
Zone II., specimen a. From the hand of crushed Ammonites. 
A dark-green tenacious and fossiliferous clay ; the fossils of a bright 
colour. Residuum after washing 12 J per cent. The washed material 
consists of shelly sand, with some entire shells in a flattened condition. 
It is of great interest to note that although these larger shells show 
the effects of pressure, the microzoa remain intact. Spines of Pseudo- 
diadema also occur here. The microzoa are not common. The 
finest washings consist of glauconite grains, prisms of Inoceramus, 
and angular quartz; also the following Foraminifera, — Bolivina 
textularioides Rss., frequent ; Globigerina cretacea d’Orb., frequent ; 
and Anomalina ammonoides Rss. sp., very common. 
Zone II, specimen b. 11 ft. from the base of the Gault, from 
a bed 1 ft. thick. The clay is of a dark greenish-grey colour, full 
of shells. Residuum 4 per cent, consisting of shelly sand and 
containing crushed Gastropods and spines of Hemiaster. Microzoa 
are not common. The fine washings are glauconitic, and show a 
marked scarcity of quartz-grains ; Anomalina ammonoides Rss. sp. 
is frequent. 
Zone II., specimen c. A very dark clay from the level of 13 ft. 
above the base of the Gault, highly fossiliferous, with shells of rich 
colours. Residuum 6J per cent, of shelly material, containing Gastro- 
pods which are slightly crushed, and numerous fragments and prisms 
of Inoceramus. Ostracoda are common, with the valves frequently 
* C. B. Rose, Trans. Micr. Soc. Lond., new series, iii. (1855) p. 7, pi. i. 
f Kolliker, Quart. Journ. Micr. Sci., viii. p. 171. 
X The fine washings referred to throughout this paper were all mounted in 
Canada balsam. 
§ The Ostracoda of the Ganlt as already known have been described and figured 
in the Monograph of the Palaeontographical Society for 1849 and 1889. See p. 572 
of this paper. 
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