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| Keywords: The Quarterly journal of the Geological Society of London (13859946183).jpg 370 H G SEELET ON A DINOSAURIAN CORACOID <br> the external articular margin of the bone is straight ; the concave <br> posterior margin is rounded from below upward and maintains a <br> uniform thickness of about 2\ centim 1 in <br> The external margin fig 4 consists of two parts ” a posterior <br> semiovate articulation a ; and an anterior subtriangular sutural sur- <br> face for the scapula b The latter is about 15 centim 6 in thick <br> and measures about 17 centim 6 in on the line where it meets <br> the glenoid cavity The external margin is about 17 centim <br> 6 in long and the internal margin is about 27 centim 10 <br> in long Where it terminates anteriorly the bone is about 4 centim <br> Yj; in thick The sutural surface is irregular and undulating but <br> lies essentially in one plane ; it is rough with cartilaginous attach- <br> ment It is at a right angle with the interior margin of the bone <br> but makes a sharp angle with the external surface <br> Fig 4 ” Scapulo-ylenoid Surface of Dinosaurian Coracoid <br> a Glenoid cavity of humerus b Sutural surface for scapula <br> The articular surface for the humerus has its outline convex ex- <br> ternally fig 4 ; behind the convexity it is sharper ; and internally it <br> is straight The greatest thickness of the bone is a little over 17 <br> centim 6 in the greatest length of the surface is 18 centim <br> 7j~ in and its greatest width about 10 centim 4 in ; the glenoid <br> cavity is gently concave but towards the outer part shows grooves <br> which indicate that the articular cartilage was not entirely ossified <br> Of all coracoids of British Dinosaurs that which approaches <br> nearest to this type is seen in the skeleton referred to Hylceosaurus <br> from the Wealden of Tilgate But in Hylceosaurus the distal por- <br> tion of the bone is more prolonged the median portion is less <br> thickened and the foramen is placed behind the middle of the <br> humeral border far away from the scapular margin The bone is 36936171 113692 51125 Page 370 Text 38 http //www biodiversitylibrary org/page/36936171 1882 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 38 1882 Geology Periodicals Smithsonian Libraries bhl page 36936171 dc identifier http //biodiversitylibrary org/page/36936171 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 N02/13859946183 2015-08-26 07 56 08 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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