Foraminifera of the Gault of Folkestone. By F. Chapman. 13 
separating it from the species with rounded extremities, as P. lactea 
(F. and M.), P. gutta d’Orb., or P. rotundata Bornemann. 
P. sororia is also frequently found in the fistulose condition, the 
outgrowth consisting of a few short radiating tubules. 
This species has been recorded from the Cretaceous beds of Lem- 
berg (Alth) ; from the Chalk of Taplow (Chapman) ; and the Ter- 
tiary beds of Pietzpuhl (Schlicht). The recent form appears to he 
widely distributed. 
The ordinary form of P. sororia was found at Folkestone in 
zone iii., rare ; zone ix., very rare ; zone xi., 50 ft. from the top, very 
rare; 45 ft., very rare ; 35 ft., very rare ; 30 ft., rare ; 25 ft., rare ; 
20 ft., very rare; 12 ft., very rare. 
The fistulose form was met with, in zone xi., 12 ft. fron the top,, 
very rare. 
Polymorphina sororia var. cuspidata Brady, plate II. fig. 13. 
P olymorphina sororia var. cuspidata Brady, 1884, Chall. Bep. ? 
vol. ix. p. 563, plate lxxi. figs. 17-19 ; plate lxxii. fig. 4. Poly- 
morphina sp., Burrows, Sherborn, and Bailey, 1890, Journ. Boy. 
Micr. Soc., p. 561, plate xi. fig. 15. 
This variety was described from recent specimens obtained from 
the N. Atlantic at depths of 808 and 1443 fathoms, and from a point 
between the Cape of Good Hope and Kerguelen Id. at 1375 fathoms 
(Brady). As a fossil it has been recorded from the Neocomian 
Pebble-beds of Guildford (Chapman);* and it has also occurred in 
the Bed Chalk of Speeton (Burrows, Sherborn, and Bailey). 
P. sororia var. cuspidata occurs in the Gault of Folkestone in 
zone v., very rare ; zone xi., 6 ft. from the top, rare. 
Polymorphina angusta Egger, plate II. fig. 14. 
P ohymorphina ( Globulina ) angusta Egger, 1857, Neues Jahrb. 
f. Min., p. 290, plate xiii. figs. 13-15. P. angusta Brady, 1884, 
Chall. Bep., vol. ix. p. 563, plate lxxii. figs. 1-3. This species has 
been described from the Lower Miocene of Bavaria (Egger), and from 
the Septaria Clay of Pietzpuhl (as P. lanceolata Beuss and Schlicht). 
In recent deposits it generally affects deep water. 
P. angusta was found in the Gault in zone iii., very rare ; zone iv. 
very rare ; zone vii., very rare. 
Polymorphina communis d’Orbigny, plate II. fig. 15. 
Polymorphina ( Guttulina ) communis d’Orbigny, 1826, Ann. Sci. 
Nat., vol. vii. p. 266, plate xii. figs. 1-4 ; Modele No. 62. Guttu- 
lina creiacea Alth, 1849, Haidinger’s Naturw. Abhandl., vol. iii. 
p. 262, plate xiii. fig. 14. Polymorphina communis Brady, 1884, 
Chall. Bep., vol. ix. p. 568, plate lxxii. fig. 19. P. gibba Burrovs, 
* Quart. Journ. Geol. Soc., 1. (1894) p. 715. . 
