422 
Transactions of the Society. 
of their more constant characteristics.* The intimate relations existing 
between the groups of the Frondicularise and the Vaginulinse are 
also discussed by the same author. 
In the series of Foraminifera from Folkestone a number of 
monstrous specimens of Vaginulinse occur, which are very interesting 
from a morphological standpoint ; and the notes upon these aberrant 
forms I propose to introduce at the end of this series of papers. 
Vaginulina recta Beuss (plate VIII. fig. 1 a , h). 
Vaginulina recta Beuss, 1862, Sitzungsb. d. k. Ak. Wiss. Wien, 
vol. xlvi. p. 48, plate iii. figs. 14, 15. V. recta Berthelin, 1880, Mem. 
Soc. geol. France, ser. 3, vol. i. No. 5, p. 41, plate ii. figs. 5a-tib. 
V. recta Burrows, Sherborn and Bailey, 1890, Journ. Boy. Micr. Soc., 
p. 559, plate X. figs. 10-13. 
This species is distinguished by the elongate and narrow form of 
the shell, and its more or less parallel edges ; moreover the diameter of 
the initial spherical chamber is nearly equal to the width of the lateral 
aspect of the shell at its commencement. The surface of the primordial 
chamber is sometimes decorated with one, or more rarely two crescent- 
shaped costulae. The surfaces of the succeeding chambers are slightly 
convex. 
V. recta was first described by von Beuss from beds equivalent to 
the Gault in North Germany, and it is also noted by that author from 
the Gault of Folkestone. It is also common in the Gault of Montcley 
(Berthelin), and mentioned as frequent from the Bed Chalk of Speeton 
(Burrows, Sherborn and Bailey). 
It is well distributed through the Gault formation at Folkestone, 
zone ii., spec, a, very rare; zone iii., frequent; zone iv., frequent; 
zone v., common ; zone vi., very rare ; zone vii., very rare ; zone ix., 
rare ; zone x., very common ; zone xi., 55 ft. from the top, very 
common; 50 ft, very common; 45 ft., common; 40 ft., common; 
35 ft. common ; 30 ft., common ; 25 ft., common ; 20 ft., very rare ; 
12 ft., frequent ; 6' ft., rare. 
Vaginulina recta Beuss var. tenuistriata (plate VIII. fig. 2). 
This variety resembles the specific form V. recta in having a 
rectilineal manner of growth, and a large and well-inflated initial 
chamber. The variety usually possesses a larger number of chambers, 
sometimes as many as fourteen. The surface of the shell is decorated 
with five vertical or oblique striae which are interrupted and very 
rarely appear to bridge over the sutural costae. The surface of the 
initial chamber is marked with striations, and is sometimes strongly 
costulate. It is distinguished from V. paucistriata Beuss, t by the 
absence of the four vertical ribs running down the back of the 
* Mem. Soc. geol. France, 1880, ser. 3, vol. i. No. 5. 
f Sitzungsb. d. k. Ak. "Wiss. Wien, 1862, vol. xlvi. p. 48, pi. iii. figs. 16 a-c. 
