Foraminifera of the Gault of Folkestone. By F. Chapman. 751 
The specimens of S. annectens from the Ganlt generally depart some- 
what from the complanate form hy the flat spiral portion being 
almost at right angles to the succeeding biserial portion. The speci- 
mens obtained from Folkestone by myself exhibit the trimorphous 
characters, but the uniserial portion is at most only represented by 
two chambers, whereas the Biggleswade specimens possess as many as 
four chambers in a straight line. The recent specimens of S. an- 
nectens recorded by Brady from Torres Strait are very regular in 
form and the spiral portion is well developed. In the Folkestone 
Gault it occurs in zone v., common ; zone xi., 45 ft. from the top, 
frequent ; 30 ft., very rare; 25 ft., frequent. 
Spiroplecta complanata Beuss sp., plate XI. fig. 4. 
(Type form) Proroporus complanatus Beuss, 1860, Sitzungsb. k. 
Ak. Wiss. Wien, vol. xl. p. 231, plate xii. fig. 5 a , b. 
The Textularian type, T. complanata Beuss sp., has been re- 
corded by Dr. Beuss, as rare, from the Gault of the Bhine, and 
by Messrs. Burrows, Sherborn, and Bailey from the Bed Chalk of 
Speeton. From Professor Parker’s MS. notes is the following: — 
“ The Biggleswade Gault specimens answer, many of them, to Beuss’s 
Proroporus complanatus , having the last cell opening at the extremity 
of the axis ; but they are often biform, and triform.” In the Folke- 
stone Gault it occurs in zone v., very rare ; zone xi., 25 ft. from the 
top, very rare. 
Spiroplecta prselonya Beuss sp., plate XI. fig. 5. 
(Type form) Textularia prselonya Beuss, 1845, Verst, bohm. 
Kreid., vol. i. p. 39, plate xii. tig. 14. 
This form agrees with the specimens of T. prselonya from Folke- 
stone previously figured (see this Journal, 1892, plate VI. fig. 23), 
with the exception that it commences with a distinctly spiral growth. 
From the fact that this form is found in three out of four of the 
horizons in company with T. prselonya we may infer that the two 
forms are intimately allied ; and further, that possibly the two 
“ genera ” of Textularia and Spiroplecta are in some way connected 
with the obscure problem of “ dimorphism.” The specimen figured by 
Messrs. Burrows, Sherborn, and Bailey under the name of S. biformis 
is possibly the same as S. prselonya. Zone xi., 50 ft. from the top, 
rare ; 45 ft., frequent ; 25 ft., common. 
Spiroplecta anceps Beuss sp., plate XI. fig. 6. 
(Type form) Textularia anceps Beuss, 1845, Verst, bohm. 
Kreid., i. p. 39, plate viii. fig. 79 ; plate xiii. fig. 2. 
This Spiroplectiform variety of T. anceps is represented by one 
specimen only, from zone xi., 45 ft. from the top. 
