VENTRICULITES. 245 
: panded examples, Lign. 81, figs. 1 and 2: and when the silex 
flint, resembling a quoit, was formed. 
_ The form of the original was evidently that of a hollow 
‘inverted cone, terminating in a point at the base, which 
_ was attached by fibrous rootlets to other bodies. The outer 
ie. 
F 
1 
ra 
e 
‘3 
‘¢ 
i 
Licy, 82. PoRTIONS OF VENTRICULITES; } nat. 
h Chalk, near Lewes. 
Fig. 1.—A specimen, in which the middle is inclosed in a flint c: the 
. 8 ; 
y external structure of the Ventriculite is seen at a, expanded on 
Zi the chalk ; and the pedicle with its roots is exposed at 6. The 
5 figures are one-fourth the size of the originals. 
2, 3, 5.—Chalk specimens, showing the external structure of stems 
of Ventriculites. 
4. A siliceous cast of the cavity of a Ventriculite covered with 
papillz, moulded in the orifices of the cells. 
“integument was reticulated, that is, disposed in meshes, like 
net-work ; and the inner surface studded with regular open- 
ings, apparently the orifices of tubular cells. The substance 
