.&. E. VINE ON THE WEDLOCK POLTZOA. 53
" Colony composed of ovoid or pyriform calcareous vesicles,
varying in length from one fifth to one third of a line, and usually
disposed in stellate clusters, each containing from three to six cells,
or sometimes more "

• .

In the Devonian species the cells are dis-
tinctly f oraminated in lines, a feature that I have not detected in the
Silurian specimens. In other respects, in the arrangement of the
stellate clusters, the partially isolated vesicles, and the connexion
of these by stolon-like processes, the species and the variety are
very similar. The vesicles in the Silurian variety vary from about
one sixth to one fifth of a line in length.
Obs. Accepting freely the full description of the species as given
by Messrs. Nicholson and Etheridge, jun., I have thought that it
would be best to give only those characters that are found in
my Silurian specimens. I thus avoid making a new species

but
by distinguishing it by a varietal name prominence is given to an
earlier type.
Habitat. On stems of crinoids and broken shells.
Localities. Buildwas beds. Rather frequent in those marked
36 and 38, somewhat rare in the other washings.
Fig. 3. — Ascodictyon radiciforme, Vine.
3
The general habit of the clustering filaments round a central axis

X 24. The
specimen selected for illustration is typical of the whole group

but there
are many varieties of stellate clusters.
5. Ascodictyon eadicifoeme, sp. n. (Fig. 3.)
Sp. Char. Colony composed of elongated root-like processes, which
vary in length from three quarters of a line to a line. These pro-
cesses are sometimes jointed; and they are disposed in circles, un-
evenly developed, radiating round a common axis, which may be

Nich. op. cit. p.