Foraminifera of the Gault of Folkestone. By F. Chapman . 423 
shell, and two on the front or inner side, the edge views of V. recta 
var. tenuistriata being unornamented and slightly convex. Yon 
Reuss* variety, moreover, has two strong costulae on the central area 
of each chamber. The length of the figured specimen measures 
1/14 in. 
It occurs at Folkestone in zone v., rare ; zone vi., rare ; zone vii., 
frequent; zone ix., rare;- zone x., very common; zone xi., 50 ft. 
from the top, very rare ; 35 ft., rare ; 30 ft., very rare ; 25 ft., very 
rare ; 12 ft., frequent ; 6 ft., rare. 
Vaginulina strigillata Reuss sp. (plate VIII. figs. 3 a, b f and 4). 
Citharina strigillata Reuss, Yerstein. bohm. Kreidef., part ii., 
1846, p. 106, plate xxiv. fig. 29. 
The specimens from the Gault are easily recognized by the fine 
but sharp vertical striation of the shell-surface, the markings running 
uninterruptedly over the sutural lines of the chambers ; the sutural 
costae being depressed in this species nearly to the general level of the 
surface of the shell. The initial chamber is more or less well inflated 
and sometimes elongated in the direction of the length of the shell. 
The edges of the test are strongly costate. The coarser varieties of 
this form may, perhaps, be comparable with the fragmentary specimen 
figured by von Reuss under the name of V. angustissima * 
V. strigillata was described from the Planermergel of Bohemia 
(Reuss) ; recorded from the Gault of Kent, probably Folkestone 
(Rupert Jones in Morris’ Catalogue and the “ Weald ” Memoir) ; and 
I have since found it in the Chalk Marl of Folkestone and the “ Chalk 
detritus ” of Charing, Kent. 
This species is found in the Gault of Folkestone in zone viii., very 
rare ; zone x., very common. 
Vaginulina truncata Reuss (plate VIII. figs. 5 a. b , and 6). 
Vaginulina truncata Reuss, 1862, Sitzungsber. d. k. Ak. Wiss. 
Wien, vol. xlvi. p. 47, plate iii. fig. 9. V. truncata Berthelin, 1880, 
Mem. Soc. geol. France, ser. 3, vol. i. No. 5, p. 39, plate i. figs. 
25-28. 
The figure given by von Reuss under the above name is taken by 
M. Berthelin for the type of a series of Vaginulina which occur 
abundantly in the Gault of France and elsewhere, and though pre- 
senting great variation in the general outline of the shell, are 
distinguished by the presence of a smaller initial chamber as compared 
with that of V. recta , by the more or less flat surface of the chambers 
between the sutural costae, and by the absence of superficial orna- 
mentation, with the exception of the initial chamber which ia often 
decorated with lunar-shaped or branching costae. This latter 
* Sitzungsb. <3. k. Ak. Wiss. Wien, 1862, vol. xlvi. p. 45, pi. iii. fig. 3. 
2 g 2 
