 | Henry Woodward - 1885 - 722 páginas
...the west side of the Belhelvie hills." 1 Sowerby's description is as follows : — " PLEUROTOMARIA, Defrance. Gen. char. A trochiform spiral shell, with...aperture ; a columella with or without an umbilicus." — (Sowerby, Min. Conch.) 2 In this paper the term mineral is used in a very wide sense, as it includes... | |
 | Henry Woodward - 1885 - 638 páginas
...side of the Belhelvie hills." 1 Sowerby's description is as follows : — " PLEUROTOMAHIA, Defrancc. Gen. char. A trochiform spiral shell, with an angular...aperture ; a columella with or without an umbilicus." — (Sowerby, Min. Conch.) 1 In this paper the term mineral is used in a very wide sense, as it includes... | |
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Defrance. Gen. char. A trochiform spiral shell, with an angular sinus near the middle of the outer lip, from which a band marked with lines of growth that indicate the sinus is carried round the whorls ; no beak or sinus at the base of the aperture ;... 