Foraminifera of the Gault of Folkestone. By F. Chapman. 647 
Cristellaria exilis Reuss, plate IX. fig. 3 a, h. 
C. exilis Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, vol. xlvi. 
pp. 66 and 92, plate vi. fig. 19 a, b. 
This species has been recorded from the Upper Hils formation 
near Brunswick (Reuss) ; and from the Gault of Folkestone (Reuss, 
and by Rupert Jones in Topley’s 4 Weald Memoir ’). From the 
Gault of France (Bertlielin). 
In the specimen from Folkestone, here figured, the chambers are' 
somewhat irregular, but the outline of the test is typical. 
C. exilis was found, at Folkestone in zone iv., very rare ; zone xi., 
35 ft. from the top, rare ; 12 ft., very rare. 
Cristellaria exilis var. crispata nov., plate IX. fig. 4 a, b. 
Test elongate, arched ; commencing in an open spiral, somewhat 
hook -shaped, formed by the first four chambers, which are compressed 
and low. The chambers rapidly increase in size and height, and the 
later ones are inflated. The younger half of the test is decorated 
with a few interrupted longitudinal or oblique striations, which 
towards the inner side of the test run on to the last segment. The 
outer or dorsal edge of the shell is compressed into a blunt keel.. 
Inner edge with a sinuous outline. Aperture marginal and produced. 
Length of test 1/36 in. 
Found in zone i., specimen b , one example. 
Cristellaria parallela Reuss, plate IX. fig. 5 a, b. 
C. parallela Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, 
vol. xlvi. p. 67, plate vii. figs, 1, 2. 
Reuss records this species from the Upper Hils clay of North 
Germany. It has also been obtained from the Gault of France 
(Berthelin) ; and was lately found in the Bargate beds of Neocomian 
age, at Littleton in Surrey (author’s MS.). 
Found at Folkestone in zone iii., rare ; zone v., very rare. 
Cristellaria cymboides d’Orbigny, plate IX. fig. 6 a, b. 
C. cymboides d’Orbigny, 1846, Foram. Foss. Vien., p. 85, 
plate iii. figs. 30, 31. C. cymboides , 1890, Burrows, Sherborn and 
Bailey, Journ. Roy. Micr. Soc., p. 560, plate xi. fig. 6. 
The Gault specimens are strikingly similar to that figured from 
the Red Chalk of Speeton by Burrows, Sherborn and Bailey 
C. cymboides has also been recorded from beds of Tertiary age in 
Austria (d’Orbigny) and Hungary (von Hantken). 
Found in the Folkestone Gault in zone viii., very rare ; zone xi., 
12 ft. from the top, very rare. 
2 y 2 
