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| Keywords: The Quarterly journal of the Geological Society of London (12711516463).jpg 52 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY <br> Caprinella In Caprinella both valves are tubular; indeed the shell <br> is made up of tubes the inner layer being evanescent whilst the sur- <br> face is formed by an extremely thin compact lamina That the tubes <br> Figs 23 24 - <br> -Sections q/Caprinula Boissii jyOrb <br> Chalk near Lisbon Mr D Sharpe <br> From Lower <br> Fig 23 <br> Fig 24 <br> Fig 23 A Transverse section of straight valve <br> Fig 24 B Transverse section of spiral valve of a w eathered specimen which has <br> lost the outer layer / I position of ligamental inflection ; t t teeth ; <br> c c cartilage-pits ; u u urabonal cavity <br> were open is proved by the limestone and small shells contained in <br> them ; and it is very improbable that even in the lifetime of the animal <br> they were permanently occupied by processes of the mantle They are <br> rather to be compared to the tubular ribs of Cardiwn costatum <br> which remain open simply because the animal does not secrete suffi- <br> cient lime to render them solid <br> Figs 25 26 27 Caprinella triangularis Desm f nat size <br> From the Upper Greensand of Rochelle <br> Fig 25 <br> Fig 25 A Portion of the left valve after D'Orbigny ; the shell- wall has been <br> removed by weathering and the camerated interior exposed <br> Fig 26 B Mould of five of the water-chambers <br> Fig 27 C Mould of the body-chamber u right umbo ; s left umbo ; t dental <br> groove ; a surface from which the posterior lobe has been detached 35614612 110213 51125 Page 52 Text v 11 http //www biodiversitylibrary org/page/35614612 1855 Geological Society of London NameFound Caprinella NameConfirmed Caprinella NameBankID 4103206 NameFound Caprinella triangularis NameFound Cardiwn costatum Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 11 1855 Geology Periodicals Smithsonian Libraries bhl page 35614612 dc identifier http //biodiversitylibrary org/page/35614612 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-23 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12711516463 2015-08-26 20 51 28 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1855 Photos uploaded from Flickr by FĂŚ using a script | ||||
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