Notices of Memoirs — G. R. Vine on Fossil Polyzoa. 513 



some facial resemlolance to the species from the Bala beds, and. 

 figured as Ramipora, var. carinata, Eth., jun.,^ by Mr. Kobert 

 Etberidge, jun., the two forms differ iu many respects considerably. 

 Ramipora is much larger naturally than the Bala Glaueonome; the 

 cells are differently arranged. In the Lower Silurian species, both 

 the primary and the secondary branches bear two rows of alternately 

 arranged cells. Having handled and carefully examined the speci- 

 men in the School of Mines, figured by Mr. Etheridge, I can bear 

 willing testimony to the faithful delineation of this beautiful type. 



There are several specimens of this as yet undescribed genus in 

 the collection already named, and their study will afford a good 

 general idea of the varying habit of the species. 



1844. FoJypora, M'Coj. 



Zoarium a delicate, reticulated, calcareous expansion. Branches 

 round, from three to five rows of cell-openings — margins usuall}'^ not 

 projecting, branches connected (occasionally) by thin dissepiments. 



This genus is represented by only one species, I*, f crassa, Lonsd., 

 in the Wenlock Limestone, Dudle3^ The genus was more fully 

 represented in America in the Devonian strata, and in our own 

 country ; — in the Arctic regions ; — and India during the Carboniferous 

 epoch. Professor Nicholson ^ describes and figures three species : 

 P. pulcJiella, Nich., P. tenella, Nich., -P. tuherculata, Nich. As a 

 P. tuherculata has been previously described by Prout,^ the name 

 of Nicholson is rather unfortunate, as there is a difference in the 

 two species, for Nicholson says his is allied to P. venucosa, M'Coy, 

 and as such it differs from Prout's P. tuherculata, if the identification 

 of the Messrs. Young be correct. P. pulcJiella and P. tenella are 

 nearly allied to P. Halliana, Prout, which occurs " in the St. Louis 

 Group of Illinois, and which I have likewise detected in the 

 Corniferous formation of Ontario." — Nicholson. 



I have now gone over all the genera wherein the cell-characters 

 are either ovate or sub-tubular, without saying arbitrarily that these 

 genera and species belong to the Cyclostomata. I have begun with 

 the species having the nearest apparent affinities with the Cheilosto- 

 MATA, and then allowed the others to fall in, in a consecutive order. 

 This temporary arrangement will be better for the present, and this 

 will allow time for a proper classification when the whole of the 

 Palasozoic Polyzoa have been more closely studied. The following 

 genera I have not the least hesitation in placing with the Cyclosfo- 

 mata as at present understood. 



1859. Cyclostomata, Busk. 



" Cell tubular ; orifice terminal, of same diameter as the cell, 

 without any moveable apparatus for its closure ; consistence cal- 

 careous."^ 



1 GrEOL. Mag. 1879. "^ New Devonian Fossils, Geol. Mag. 1874. 



3 Trans, of Acad, of Science, St. Louis, Geol. Mag. June, 1874. 

 * Monograph of the Crag Polyzoa, p. 9. 



DECADE II.— YOL. Till. — NO. XI. 33 



