Keywords: The Quarterly journal of the Geological Society of London (13935692101).jpg 1866 <br> YOUNG CAllBONIFEROFS GLYPTODir TERINES <br> 597 <br> lated by similar anastomosing ridges The pectoral arch is well <br> developed and supports a subacutely lobate fin with rounded margin <br> The two dorsals the ventrals and anal are of nearly equal size and <br> opposite each other respectively The tail is heterocereal and <br> rhomboidal <br> Figs 1-8 ” Illustrating the teeth and scales of some new genera of <br> Carhoniferous Fishes <br> Fig 1 Rhomboptychius tooth <br> 2 Rhomboptychius scale <br> 3 Strepsodus tooth <br> 4 E hizodus scale <br> Fig 6 Rhizodus tooth <br> 6 Megalichthys scale <br> 7 Dendroptychius scale <br> 8 Rhizodopsis scale <br> The scales vary somewhat in size and shape on different parts of <br> the body ; they are arranged in very oblique series and range from <br> nearly orbicular to elongate cordate The upper surface is orna- <br> mented with concentric and radiating striae; the latter are most <br> strongly marked over two triangular areas whose bases correspond <br> to the centre of the anterior and posterior margins respectively ; the <br> former occupy the lateral surfaces between those areas The under <br> surface is marked by more or less numerous growth-lines presents <br> a subcentral raised boss and is usually pitted over a small area <br> immediately behind the centre ; no corresponding tubercles are visible <br> on the upper surface whose free area averages two-thirds of the <br> whole surface The lateral line is well marked and nearly straight <br> The notochord is persistent ; the osseous rings surrounding it are <br> short and narrow The upper arches are distinct and well ossified <br> These characters are in the main those of the family to the cycloidal <br> section of which Holo tychius belongs But from that genus Rhi- 36165052 111477 51125 Page 597 Text v 22 http //www biodiversitylibrary org/page/36165052 1866 Geological Society of London NameFound Carhoniferous NameFound Dendroptychius NameConfirmed Dendroptychius NameBankID 4138875 NameFound E hizodus NameFound Megalichthys NameConfirmed Megalichthys EOLID 4654673 NameBankID 4234587 NameFound Rhizodopsis NameConfirmed Rhizodopsis NameBankID 4330317 NameFound Rhizodus NameConfirmed Rhizodus EOLID 13307246 NameBankID 4330320 NameFound Rhomboptychius NameConfirmed Rhomboptychius NameBankID 4330844 NameFound Strepsodus NameConfirmed Strepsodus EOLID 13307249 NameBankID 4355764 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 22 1866 Geology Periodicals Smithsonian Libraries bhl page 36165052 dc identifier http //biodiversitylibrary org/page/36165052 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-21 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13935692101 2015-08-26 06 51 47 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1866 Photos uploaded from Flickr by Fæ using a script |