330 G. W. SHRUBSOLE AND G. R. VINE ON THE 
As a natural consequence, there can be no generic relationship 
between the tubular cell of this Bala ‘Glauconome, and the open 
quadrate one of the Dudley species. The difference between them 
is considerable ; it iseven more than generic. The zoarial character, 
as seen in the Dudley species, can have no place even among the 
Cyclostomatous Polyzoa. There is an antique arrangement of the 
cells unlike anything in recent types. Its characteristics are entirely 
Paleozoic. It is scarcely necessary to say that the numerous species 
of Carboniferous Glauconome with their cylindrical zocecia can no 
longer be associated with the Dudley species. The latter is a polyzoan 
which is not provided for in the existing suborders of the group ; 
and for the reception of it and similar species, a suitable suborder 
will be requisite. It will remain the type and, so far as at present 
known, the only representative of the genus Glauconome. On the 
other hand the Bala species is clearly allied by close zoarial affinity 
with the Devonian and Carboniferous Glauconome, and may be in- 
cluded in a new genus to be presently described. We are aware 
that some years ago* Mr. Htheridge, Jun., proposed to assign this 
Bala species to Ramzpora, a genus founded by Toula upon a frag- 
ment of a Polyzoan brought from the Arcticregions. The reference 
mainly rested on a certain outward resemblance, not very marked 
or reliable, which cannot outweigh its zoarial agreement with the 
Carboniferous Glauconome, or even its outward resemblance to the 
perfect condition of the zoarium in the same. 
The new genus to be now described will include the discarded 
Bala, Devonian, and Carboniferous species of Glawconome. 
PINNATOPORA, nov. gen. 
GLAUCONOME (pars), M‘Coy, Brit. Pal. Fos. p. 49. 
Zoarium made up of a series of main stems, having a common 
attachment, with secondary and tertiary branches, which come off 
at an acute angle. The tertiary branch may or may not unite with 
a corresponding branch on the adjoining stem. Zocecia cylindrical, 
arranged in longitudinal and alternate series over one half of the 
surface. Between the row of cells a dividing keel. 
Prnnatopora SEDewIicK1I, Shrubsole. 
Glauconome disticha (pars), Lonsdale, Brit. Pal. Fos. p. 49. 
Ramipora Hochstettert, var. carinata, R. Eth. Jun., Geol, Mag. 
1879, p. 241. 
Sp. char. Zoarium a series of main, non-bifurcating stems growing 
from a common base, having alternate, secondary, and tertiary 
branches, the latter uniting with a corresponding branch on the 
adjoining stem, so as to connect the entire zoarlum. Zocecia long, 
tubular; aperture circular, arranged longitudinally in alternate 
rows, spread over one half of the surface. A dividing keel between 
the rows of cells. Reverse angular. 
Obs. The chief interest of this species is that it is the oldest known 
* Geol. Mag. 1879, p. 241. 
