Foraminiferd of the Gault of Folkestone. By F. Chapman. 587 
hemise, No. 1, p. 53, plate ix. figs. 1-6. Vitriivebbina tuberculata 
Chapman, 1896, Ann. and Mag. Nat. Hist., vol. xviii. p. 332, fig. 4. 
The following description of V. tuberculata is given by Sollas, op. 
cit. supra : “ Surface of test ornamented by a number of tubercles 
irregularly disposed, generally hemispherical and depressed, resem- 
bling the rivet -heads on an iron girder, but sometimes conical 
and transversely truncated; average diameter 0-00105 in., height 
0 * 0008 in. In some specimens the tubercles appear to be larger 
and more numerous than in others.” 
This species occurs in the Gault of Merstham (author’s coll.) ; it 
has also been found in the Cambridge Greensand (Sollas), and the 
Cenomanian and Chalk of Bohemia (Perner). 
In the Gault of Folkestone it has occurred only in zone vii., where 
it is rare. 
Family GLOBIGEBINIDM. 
Globigerina d’Orbigny [1826]. 
Globigerina bulloicles d’Orbigny, plate XIII. fig. 4. 
Globigerina bulloides d’Orbigny, 1826, Ann. Sci. Nat., vol. vii. 
p. 277, No. 1. — Modeles, Nos. 17 and 76. Id., 1816, For. Foss. 
Vien., p. 163, plate ix. figs. 4-6. Brady, 1884, Chall. Bep., vol. ix. 
pp. 593-5, plates lxxvii., lxxix. figs. 3-7. Burrows, Sherborn, and 
Bailey, 1890, Journ. Boy. Micr. Soc., p. 561, plate xi. fig. 17. Jones, 
1896, Monogr. Crag Foram. (Pal. Soc.), pt. iii. pp. 280-4 (Synonyms). 
G. bulloides is well known as occurring in the Cretaceous strata, 
but it does not appear to be anywhere in great abundance in those 
deposits ; for G. cretacea plays an important part in the constitution 
of a large portion of the Gault clays and marls, just as G. bulloides 
does in the formation of some recent deposits. The species is also 
well distributed and abundant in the Tertiary strata, and seems to 
increase in importance to the present day. 
The Gault specimens, although referred without hesitation to the 
above species, are not absolutely typical, since the early chambers are 
more numerous and not so well inflated as those found in deposits of 
later age. The turbinoid spire of the Cretaceous specimens is more 
depressed than that of typical examples. It is worth noting that 
G. bulloides was also obtained from the Neocomian series (Bargate 
beds) in the neighbourhood of Guildford in Surrey,* where it was 
found associated with G. cretacea ; but although the latter is so 
excessively abundant in the Gault, both species are rare in the Neo- 
comian beds. G. bulloides has also been recorded from the Bed Chalk 
of Yorkshire (Burrows, Sherborn, and Bailey). 
G. bulloides was found in the Gault of Folkestone in zone iv., very 
rare ; zone vi., very rare ; zone xi., 55 ft. from the top, very rare ; 
* Chapman, Quart. Journ. Geol. Soc., 1. (1894) p. 71S. 
