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| Keywords: The Quarterly journal of the Geological Society of London (13859696235).jpg G K VINE ON THE WEDLOCK POLYZOA <br> 67 <br> Localities Buildwas beds No 38 only ; Coalbrookdale beds very <br> rare fragments ; Tickwood beds No 25 and No 42 <br> Fig 14 ” Ptilodictya interporosa Vine <br> A portion of the branch of one specimen showing the central and lateral <br> arrangement of cells with the intercellular spaces filled with smaller open- <br> ings X 12 <br> 20 Ptilodictya intekpokosa sp n Tig 14 <br> Zoarium consisting of a thin narrow branching frond of unknown <br> extension Zocecia arranged in two orders ; the median row or <br> rows may or may not be perpendicular to the base and may con- <br> sist of from one to four rows ; for this character is very variable the <br> lateral rows are oblique extending to the margin of the zoarium <br> which is rather sharp-edged but without any marginal striae cells <br> oval slightly compressed in the middle rather larger towards the <br> margin The whole of the cells are surrounded by minute openings <br> interstitial tubules which becoming filled in in the older <br> growth of the colony present the appearance of a minutely granular <br> peristome to the cell About four cells with their interstitial <br> tubules occupy the space of a line in either a longitudinal or oblique <br> direction and about six transversely The compressed character of <br> the median rows in one specimen alters this measurement slightly ; <br> but the clearly defined character of the cells of this species is <br> unmistakable <br> Locality Tickwood beds No 42 <br> This beautiful species is founded upon ten fragments the longest <br> of which is not more than a quarter of an inch in length The <br> characters however are so distinct and so unlike those of any other <br> Ptilodictya that I know of that I cannot do otherwise than describe <br> it as new At first sight the specimens may be mistaken for a Fis- <br> tulipora M c Coy ; but although hundreds of fragments of Fistulipora <br> are found in the same beds only the ten specimens of this as above- <br> named have been found The orifices of the cells of P interporosa <br> are distinctly oval ; in Fistulipora they are circular ; and in the <br> zoarium of this latter species there are non- cellular spaces which <br> are filled in with interstitial tubuli of a most marked character In <br> Of Nicholson <br> j 2 36935834 113692 51125 Page 67 Text 38 http //www biodiversitylibrary org/page/36935834 1882 Geological Society of London NameFound Fistulipora NameConfirmed Fistulipora EOLID 6833017 NameBankID 265755 NameFound Polyzoa NameConfirmed Polyzoa EOLID 64139 NameBankID 2764675 NameFound Ptilodictya NameConfirmed Ptilodictya NameBankID 265494 NameFound Ptilodictya interporosa Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 38 1882 Geology Periodicals Smithsonian Libraries bhl page 36935834 dc identifier http //biodiversitylibrary org/page/36935834 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-15 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13859696235 2015-08-26 07 51 45 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1882 Photos uploaded from Flickr by Fæ using a script | ||||
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