On a New Genus of Cephalopoda, Diploceras (Orthoceras bisiphonatum of Sowerby); and on the occurence of Ascoceras in Britain

J. W. Salter
1856 Quarterly Journal of the Geological Society  
doi:10.1144/gsl.jgs.1856.012.01-02.49 fatcat:rejtusmnabdghdoakhapqvjxvq