ON FOSSIL POLYZOA. 193 
—‘a form which appears to differ from typical species of Synocladia by 
having from one to four rows of cell-apertures on the dissepiment sinstead 
_ of two.’ Mr, Hiram A. Prout, neither in his description of the generic 
character of Septopora, nor in the species which he places in the genus, 
says anything about supplementary pores; yet, in comparing specimens 
of Mr. Etheridge’s Synocladia carbonaria with the beautiful figures of 
Prout, it appears to me that the ‘ medallion face,’ with its irregular lines 
of pores on the dissepiments, only represents the full features now known 
to exist in carboniferous species (supplementary pores) which were only 
known as ‘gemmuliferous vesicles’ when King described his Permian 
Synocladia. If, therefore, some of my American friends can examine 
Prout’s species, or fragments of the same, this matter may be set at rest, 
and in all probability the Scotch Carboniferous Synocladia (?), already 
described by Mr. Etheridge and Mr. John Young, may be placed here. 
Waiting, therefore, further investigations, I will place, temporarily ait 
least, the species at present known to exist in our British rocks. 
Carboniferous, Septopora, (?) carbonaria, Eth. jun. 
. 43 scotica, Young & Young. 
is 3 Senestelliformis, J. Young. 
Whatever generic name the above species may bear in the future, I 
do not think they can be more fittingly placed than in the present 
family. There is, however, an element of doubt in the adoption of 
Septopora, and, but that the Messrs. Young have associated the name 
Diplopora with an altogether different species, I would suggest that 
Septopora should be replaced by Diplopora. 
There are two or three more species that may be placed in the 
family, although the secondary pores are differently placed. They are :— 
Glauconome (Diplopora) marginalis, Young & Young. 
(Acanthopora) stellipora 
” ” 
Actinostoma fenestrata 
? 
The element of structure in Acanthopora and Actinostoma are the rayed 
orifices of the Zowcia. A feature so prominent as this ought not to be 
under-estimated, but in the present state of our knowledge respecting 
the operculate or non-operculate coverings of the cells of palaozoic species 
of Polyzoa, it would, perhaps, be unwise to fix any particular types for 
these genera. 
As subgeneric forms of the FrnrsTetiips, the following peculiarly 
distinct types may in the future be favourably considered. At present,, 
it is impossible to localise the species in this classification on account of 
fictitious, or insufficiently described, characters. 
Genus, Fenestralia, Hiram A. Prout. Carb. Bryozoa.? 
»  Synocladia, King. Permian species. 
IT am also unable at present to give a resting-place to Mr. Robert 
Etheridge’s type species, 
Goniocladia cellulifera. 
7 This is a peculiar species, and I am not sure that Iam right in placing it here, 
“ aed described by Mr. John Young, Proc. Nat. Hist. Soc. Glasgow, January 
> € ; 
* Transactions of St. Lowis Acad. of Sci, First of a Series on ‘ Carboniferous 
Bryozoa.’ H. A. Prout. Vol, I. 1858. 
1883. 0) 
