Foraminifera of the Gault of Folkestone. Eg F. Chapman. 591 
and 13. Jones, 1896, Monogr. Crag Foram. (Pal. Soc.), pt. iii. 
p. 292, plate vii. figs. 28 a-c. 
It is interesting to note the extended geological range of this 
species by its occurrence in the Gault, since it has hut recently been 
recorded for the first time from beds as old as the Chalk of Manitoba 
(Tyrrell). * D. globularis is also known from the Older Tertiary 
strata of Adelaide, and of Muddy Creek, ^Victoria (Howchin). It 
occurs in nearly all succeeding formations of later date. 
Asa recent form D. globularis is found in shallow waters, usually 
in temperate and suh-tropical areas. 
This species was found in the Gault in zone xi., 30 ft. from the 
top, very rare. 
Discorbina orbicularis Terquem sp., plate XIII. figs. 12 a , b. 
Rosalina orbicularis Terquem, 1876, Anim. sur la Plage de 
Dunkerque, p. 75, plate ix. figs. 4 a, b. Discorbina orbicularis 
Brady, 1884, Chall. Rep., vol. ix. p. 647, plate lxxxviii. figs. 4-8. 
Chapman, 1894, Quart. Journ. Geol. Soc., vol. 1. p. 719. Jones, 1896, 
Monogr. Crag Foram. (Pal. Soc.), pt. iii. p. 295, plate vii. figs. 31 a-c. 
This species has been previously noted from the Neocomian beds 
of Surrey (Chapman) ; and it also occurs in various Tertiary forma- 
tions. It is an essentially shallow-water organism in recent deposits. 
D. orbicularis was found in the Gault in zone xi., 55 ft. from the 
top, rare. 
Discorbina turbo d’Orbigny sp., plate XIII. fig. 13 a, b. 
Rotalia (Trochulina) turbo d’Orbigny, 1826, Ann. Sci. Nat., vol. 
vii. p. 274, No. 29 ; Modele, No. 73. Discorbina turbo Carpenter 
1862, Introd. Foram., p. 204. Brady, 1884, Chall. Rep., vol. ix. 
p. 642, plate lxxxvii. figs. 8 a-c. Chapman, 1894, Quart. Journ. 
Geol. Soc., vol. 1. p. 719. Jones, 1896, Monogr. Crag Foram. (Pal. 
Soc.), pt. iii. p. 291, plate vii. figs. 29 a-c. 
This shallow-water species occurs in the Neocomian of Surrey 
(Chapman) and the Chalk of Maestricht (Parker and Jones). It is 
also a well-known Tertiary fossil. 
D. turbo was found in the Gault in zone viii., very rare. 
Discorbina pileolus d’Orbigny sp., plate XIII. figs. 14 a, b. 
Valvulina pileolus d’Orbigny, 1839, Foram. Amer. Merid., p. 47, 
plate i. figs. 15-17. Discorbina pileolus Parker and Jones, 1865, 
Phil. Trans., vol. civ. p. 385. Brady, 1884, Chall. Rep., vol. ix. 
p. 619, plate lxxxix. figs. 2-4. Chapman, 1891, Quart. Journ. Geol. 
Soc., vol. 1. p. 719. 
Besides occurring in the Neocomian strata of Surrey, this shallow- 
water species is known from various Tertiary strata. 
D. pileolus was found in the Gault in zone xi., 12 ft. from the 
top, very rare. 
* Trans. Roy. S'oc. Canada, vol. viii. section iv. 1890, p. 114. 
