Foraminifera of the Gault of Folkestone. By F. Chapman. 425 
top, common ; 50 ft., common ; 45 ft., common ; 40 ft., common ; 
35 ft., common ; 30 ft., common ; 25 ft., common ; 20 ft., common ; 
12 It., frequent; 6 ft., very rare. 
Vaginulina gaultina Berthelin, plate VIII. fig. 8 a, b. 
Vaginulina gaultina Berthelin, 1880, Mem. Soc. geol. France, 
ser. 3, vol. i. No. 5, p. 39, plate i. figs. 22 a-24. 
This species has been described from the Gault of Montclev by 
M. Berthelin, and it is a characteristic fossil at Folkestone. I have 
also met with very good examples of V. gaultina from the “ Chalk 
detritus ” of Charing, Kent. In outline the shell is broader and 
more equi-triangular than V. truncata. It is easily distinguished 
by its strongly and obliquely striated sutural ridges. The initial 
chamber is inflated, and resembles that of V. truncata in point of 
size. The surfaces of the inter-sutural spaces are flat or slightly 
excavate. 
V. gaultina is found in the Folkestone Gault, in zone iii., very 
rare ; zone iv., very rare ; zone v., rare ; zone vii., frequent ; zone viii., 
very rare ; zone ix., rare : zone x., very common ; zone xi., 55 ft. 
from the top, frequent ; 35 ft., very rare ; 30 ft., very rare ; 25 ft., 
very rare. 
Vaginulina arguta Beuss, plate VIII. fig. 9 a , b. 
Vaginulina arguta Beuss, 1860, Sitzungsb. d. k ; Ak. Wiss. Wien, 
vol. xl. p. 202, plate viii. fig. 4. V. arguta Beuss, 1862, op. cit., 
vol. xlvi. p. 47, plate iii. fig. 13. V. arguta Berthelin, 1880, Mem. 
Soc. geol. France, ser. 3, vol. i. No. 5, p. 42, plate ii. figs. 7 a-8 b. 
V. arguta Burrows, Sherborn and Bailey, 1890, Journ. Boy. Micr. 
Soc., p. 559, plate x. figs. 14, 15. 
The above name can be conveniently applied to those forms which 
do not possess a salient initial chamber, but which in other respects 
resemble V. truncata. 
V. arguta is by no means a common form in the Gault series. 
It has previously been recorded from the Flammenmergel and the 
Minimus - thon of North Germany and the Gault of Folkestone 
(Beuss) ; from the Bed Chalk of Speeton (Burrows, Sherborn and 
Bailey) and from the Gault of France (Berthelin). 
It is found in the Gault of Folkestone in zone x., rare ; zone xi., 
55 ft. from the top, rare ; 50 ft., very rare ; 45 ft., rare ; 25 ft., rare ; 
20 ft., rare ; 12 ft., frequent ; 6 ft., rare. 
Vaginulina striolata Beuss, plate VIII. fig. 10. 
Vaginulina striolata Beuss, 1862, Sitzungsb. d. k. Ak.\Vis3 
Wien, vol. xlvi. p. 46, plate iii. fig. 7. 
This species resembles F. arguta in respect of the non-salient 
initial chamber, but differs from it in having the surface of the shell 
