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| Keywords: The Quarterly journal of the Geological Society of London (13071148543).jpg 1867 <br> SALTER TRACKS OF PTERASPIS <br> 335 <br> nor equidistant nor alike in their depth or direction; nor is the <br> number of imprints the same in each track So that we are at once <br> relieved of the supposition that a single individual with three series <br> of appendages could have left this as its compound track ; and we <br> are at liberty to treat each as independent though their main direc- <br> tion is the same namely along the line of the tide-wash as indi- <br> cated by the stripe A to A B to B c <br> rig 1 <br> Two of these at least are the track of the same creatui'e repeated <br> in its double journey from water to shore or vice versa ; and I think <br> but am not sure the third track is e\idence of another advance of <br> the same individual in a parallel direction We may suppose then <br> the effort of the animal whatever it was to reach the deeper water 36345090 112028 51125 Page 335 Text v 23 http //www biodiversitylibrary org/page/36345090 1867 Geological Society of London NameFound Pteraspis NameConfirmed Pteraspis EOLID 4655774 NameBankID 4322058 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 23 1867 Geology Periodicals Smithsonian Libraries bhl page 36345090 dc identifier http //biodiversitylibrary org/page/36345090 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-10 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13071148543 2015-08-26 13 54 14 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1867 The Quarterly journal of the Geological Society of London 1867 Photos uploaded from Flickr by FĂŚ using a script | ||||
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