586 
Transactions of the Society. 
Vitriwebbina Isevis lias been recorded from the middle Marl of 
Yincentown, New Jersey (Bagg); from the Folkestone-Gault (Chap- 
man) ; and from the Greensand of Cambridge (Sollas). I have also 
found several specimens in the “ Chalk detritus ” of Charing, Kent, 
from material with which Prof. Kupert Jones has kindly favoured me. 
In the Gault of Folkestone, the above species was found in zone 
vii., frequent ; zone xi., 50 ft. from top, very rare. 
Vitriwebbina Sollasi Chapman, plate XIII. fig. 1. 
V. Sollasi Chapman, 1892, Geol. Mag. Dec. III. vol. viii. p. 53, 
plate ii. figs. 1-3. Bagg, 1895, Johns-Honkins Univ. Circ., xv. 
No. 121, p. 12. 
Test adherent, consisting of as many as seven chambers in full- 
grown individuals, but usually from one to four in number. Chambers 
hemispherical or pyriform. Shell usually of a pale brown or cream 
colour, though sometimes white, and always opaque and dull. This 
form differs from V. tuber culata in the absence of tubercles which 
are scattered over the shell in the latter species, and in having the 
surface of the test slightly pitted. 
These adherent species, notably this and the following, make a 
distinct floor of attachment which covers a considerable area inside 
the shell, and which also extends outside as a non-tubulate shell- 
flange. 
F. Sollasi has been previously recorded from the Folkestone Gault 
Chapman) ; and from the middle Marl of Yincentown, New Jersey 
Bagg). I have also found many examples in the “ Chalk detritus ” 
of Charing, Kent, and the Gault of Merstham. Single embryonic 
or septate segments of this species are commonly found adherent to 
shell fragments in the Gault. 
As regards the Folkestone Gault, this species was found in zone i. 
spec, a, very rare ; zone iii., very rare ; zone v., frequent ; zone vii., 
frequent ; zone x., rare ; zone xi., 20 ft. from the top, frequent. 
Vitriwebbina Sollasi Chapman var. gonoidea f plate XIII. fig. 2. 
This variety differs from the typical specific form in the peculiar 
angulate or cuspidate outline of the segments. The shell-texture and 
general characters are similar to those of the species. Length 1/6 in. 
From the form of the segments one is led to infer that this variety 
shows an affinity with Ramulina cervicornis. 
Found in zone xi., 20 ft. from the top, of the Gault at Folkestone, 
very rare. 
Vitriwebbina tuberculata Sollas sp:, plate XIII. fig. 3. 
Webbina tuberculata Sollas, 1877, Geol. Mag. Dec. II. p. 104, 
plate vi. figs. 4-7 and 9. Trochammina irregularis Perner, 1892, 
Ceska Ak. Cfsafe Frantiska Josefa, Prague, Palaeontographica Bo- 
