Foraminifera of the Gault of Folkestone. By F. Chapman. 11 
broader and more regularly oval forms resembling very closely those 
known as P. turgida (Reuss) * and P. rotundata Bornemann.t 
P. gutta has been recorded from the Hils-clay of North Germany 
(Reuss) ; from the Neocomian beds of Surrey (Chapman) ; and from 
Tertiary clays of North Italy and Germany, the Barton beds of the 
Isle of Wight and the Crag of Suffolk (Parker, Jones, and Brady). 
The usual character of the fistulose modification of P. gutta from 
the Gault is that of scattered tubules disposed evenly but sparsely 
over the whole of the test. Those figured by Schlicht are fistulose in 
the apical region of the test. 
The ordinary type of this species was found in the Gault in 
zone xi., 55 ft. from the top, very rare ; 45 ft., very rare. 
The occurrences of the fistulose examples are : — Zone xi., 12 ft. 
from the top, frequent ; 6 ft., rare. 
Polymorphina fusiformis Rosrner, plate II. fig. 9. 
Polymorph ina (Globulina) fusiformis Roemer, 1838, Neues Jahrb. 
f. Min., p. 386, plate iii. fig. 37. P. liassica Strickland, 1845, 
Quart. Journ. Geol. Soc., vol. ii. p. 30, fig. b. P. lanceolata Reuss, 
1851, Zeitschr. deutsch. geol. Gesellsch., vol. ii. p. 83, plate vi. fig. 50, 
Globulina prisca Reuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, 
vol. xlvi. p. 79, plate ix. fig. 8 a , b. Polymorphina prisca Berthelin, 
1880, Mem. Soc. geol. France, ser. 3, vol. i. No. 5, p. 57, plate iv. 
fig. 20 a, b. P. lactea (elongate variety) Brady, 1884, Chall. Rep., 
vol. ix. p. 559, plate lxxi. fig. 14. P. lactea Burrows, Sherborn, and 
Bailey, 1890, Journ. Roy. Micr. Soc., p. 561, plate xi. fig. 10. 
Fistulose Form, plate II. fig. 10. 
Polymorphina horrida Wright, 1875, Rep. and Proc. Belf. Nat. 
Field Club for 1873-4, Appendix 1875, p. 85, plate iii. fig. 14. 
P. prisca Berthelin, 1880, Mem. Soc. geol. France, ser. 3, vol. i. 
No. 5, p. 57, plate iv. fig. 21. P. horrida Burrows, Sherborn, and 
Bailey, 1890, Journ. Roy. Micr. Soc., p. 561, plate xi. fig. 14. 
This form has been described under many different names, but 
although a variable species, it possesses certain marked characters by 
which it can be readily recognised. P. fusiformis has an ovate 
elongate test, tapering to the oral end, and with a more or less pointed 
aboral extremity. The transverse section of the test is broadly oval 
to nearly circular. Occasionally specimens are met with in which the 
breadth of the test is much greater than is usual in more typical 
specimens, and it is thus seen to pass almost insensibly into the 
heavier, more turgid, and inequilateral form of P. sororia. Some 
of the specimens from the Gault have their surfaces studded with fine 
prickles. 
* Guttulina turgida Eeuss, 1856, Sitzungsb. d. k. Ak. Wiss. Wien, xviii. p. 246, 
pi. vi. fig. 66. 
t Zeitschr. Deutsch. Geol. Gesell., vii. (1855) p. 366, pi. xviii. fig. 3. 
