A synopsis of the Silurian fossils of Ireland: Prepared by Frederick M'Coy from the collections made from the several districts examined by Sir Richard Griffith, as at present laid down on his geological map of Ireland: with descriptions of some additional species by J. W. Salter. With five lithographic plates
Williams & Norgate, (R. Hartmann), 1862 - 72 pages
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abundant allied angles Ballygarvan base beak broad calcareous slates cardinal cast cephalothoracic Chair of Kildare characters cheeks close common Cong convex County Galway County Kerry County Kildare County Mayo County Tyrone County Waterford County Wexford diameter differs Dingle distinct distinguished Egool entire equal eyes Ferriter's Cove figure flat flattened fossil four front furrows genus Geol glabella grey slates half lines head inch lateral Leenane length less limestone of Chair lines lobe Locality.—Common Locality.—Not uncommon Locality.—Rare M'Coy magnified margin marked mesial middle narrow natural nearly obtusely ORTHIS Page plates pointed Pomeroy portion Portk posterior present radiating rare Ref-Sil Ref—Geol resembles ridges rounded sandstone schists of Tirnaskea seems segments shell short side Silurian slates of Ardaun slates of Doonquin slates of Ferriter's slightly smooth species specimens spines striae strong surface Syst tubercle valve ventral whorls wide width