MAKE A MEME View Large Image The Quarterly journal of the Geological Society of London (12646343554).jpg 518 <br> TEOCEEDINGS OF THE GEOLOGICAL SOCIETY June 17 <br> is a trifid shelly process fig 2 b noticed above as giving attach- <br> ment to the adductor muscles ; ...
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Keywords: The Quarterly journal of the Geological Society of London (12646343554).jpg 518 <br> TEOCEEDINGS OF THE GEOLOGICAL SOCIETY June 17 <br> is a trifid shelly process fig 2 b noticed above as giving attach- <br> ment to the adductor muscles ; but as this lies above the middle <br> portion of the outer loop c while it occupies the hollow fig 3 b <br> Figs 1-3 illustrating Thecidium Adamsi <br> Fig 1 <br> Fig 1 Superior view of the exterior <br> a Ventral valve <br> b Dorsal valve <br> c Umbone <br> ˘ d Hinge-area <br> e Deltitium <br> Fig 2 Inferior view with a por- <br> tion of the ventral valve <br> a broken away to show- <br> the adductor process b the <br> outer plain loop c the <br> intermediate half- loops d <br> and the median crest / <br> Fig 3 Interior view of the dorsal <br> valve <br> a Cardinal process <br> b Recess for the adductor <br> process of the ventral valve <br> c Hinge-tooth <br> d Granulated margin <br> e Outer simple loop <br> / Intermediate half-loops <br> g Inner reflected loop <br> h Median crest <br> i Points of origin of the parts <br> composing the internal <br> framework <br> in front of the cardinal process a of the dorsal valve it follows that <br> when the shells are intact they cannot be forcibly separated without <br> breaking the loop fig 2 c upon the adductor process b I there- <br> fore very cautiously broke away the ventral valve from below as <br> shown in fig 2 and by simply studying the relations of the parts I <br> was enabled to perfect the scheme of the loop-apparatus as given in <br> fig 3 <br> The hinge-area fig 1 d slopes downwards and a little back- <br> wards from the line of union of the valves to the beak; and 35328505 109632 51125 Page 518 Text v 19 http //www biodiversitylibrary org/page/35328505 1863 Geological Society of London NameFound Adamsi NameConfirmed Adamsi NameBankID 5100693 NameFound Thecidium NameConfirmed Thecidium NameBankID 4368134 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 19 1863 Geology Periodicals Smithsonian Libraries bhl page 35328505 dc identifier http //biodiversitylibrary org/page/35328505 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-20 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12646343554 2015-08-27 11 51 34 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1863 Photos uploaded from Flickr by Fæ using a script
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