Notices of Memoirs — G. R. Vine on Fossil Polyzoa. 515 



Lonsd., of the Silurian System, pi. 15, fig. 7. I have found frag- 

 ments in the washings of Mr. Maw.^ Another specimen of the same 

 species, from the Wenlock Limestone, Dudley, encrusting a small 

 coral, is in the cabinet of Mr. Longe, F.G.S., of Cheltenham. In 

 the Devonian collection of Polyzoa, at the School of Mines, a species 

 marked Berenicea M'Coyii, Salter, Middle Devonian, Padstow, bears 

 a very close resemblance to this Silurian type. Unfortunately the 

 Devonian specimen is very poorly preserved, but I can trace in the 

 zoariam a sufficient number of cells to afford me some idea of the 

 general character. The specimen in Mr. Longe's cabinet I have 

 carefully studied, and I now give a description with very accurate 

 measurements. 



Zoaria encrusting by a single layer a fragment of coral. Zooecia 

 tubular, rather regular, in series. As several colonies are found 

 upon the same coral, a remarkably irregular character is given to 

 the associated zoaria. For the purpose of this diagnosis I isolate a 

 single colony. Cell-mouths circular, with a well-formed peristome, 

 and slightly less than the diameter of the tubes. Six zocecia occupy 

 the space of a line measured across the mouth of the cells, and two 

 and half, to three, lengthwise in the same space. ^ 



The habit of Lonsdale's species in the School of Mines, and also 

 Salter's Devonian Berenicea, is that of the ordinary Dtastopora. The 

 habit of the species here described, and also the measui'ements, cor- 

 respond with Nicholson's Alecto confusa. If these be true Diasto- 

 para — for I cannot ignore the existence of D. consimilis and Berenicea 

 M'Coyii — we have a true tubular Diastopora carried backward in 

 time to the Wenlock Limestone ; consequently the Berenicea which 

 J left provisionally with the DiastoporidcB ^ will be displaced by un- 

 doubted tubular species. The measurement of Alecto confusa, Nich., 

 is five cells to the line, measured across the mouth.* This is slightly 

 less than my own, and may be accounted for by the more compact 

 arrangement of the cells in the Dudley specimen. 



1826. Geriopora, Goldfuss. 



Several species of this genus are given as Up. Silurian by authors, 



Ceriopora affinis, Goldfuss. 



,, granulosa, ,, 



„ punctata, „ 



and Nicholson in his New Devonian Fossils adds Ceriopora ? Samil- 



tonensis, of which he says, " This beautiful little fossil (about five 



cells occupy the space of a line vertically) occurs in great abundance 



^ In plate 15, Silurian System, reproduced as pi. xU., Silurian, ed. 1859, 

 marked 7. Diastopora ? consimilis, probably a Bryozoou. 



* This was written in December, 1880, a copy of wkicli was furnished shortly after 

 to Mr. Longe, for his correction and approval for publication in this Report, as 

 Alecto confusa, Nicholson ? var. regularis. I have seen since that a paper has been 

 furnished for reading on Diastopora, at the Geol. Soc. May, 1881. I have no 

 desire to press my own name in preference to his, seeing that I wrote my description 

 previously to the examination of Lonsdale's and M'Coy's Silurian and Devonian 

 species in the School of Mines. 



^ Review of the Fam. Diastoporidcv-, Quart. Journ. Geol. Soc. Aug. 1880. 



* Nicholson does not say this, but I infer it from his remarks. 



