Palæozoic Fossils: On some new or little-known species of Lower Silurian fossils from the Potsdam group (Primordial zone). On some new species of fossils from the Calciferous Chazy, Black river, and Trenton formations. On some new species of fossils from the Quebec group. New species of fossils from different parts of the Lower, Middle and Upper Silurian rocks of Canada. New species of fossils from the limestones of the Quebec group from Point Lévis and other localities in Canada east. New species of fossils from the Quebec group in the northern part of Newfoundland. New species of fossils from the Quebec group, in eastern Canada, with some others previously described, and some from other formations. New species of fossils from the Califerous formation, with remarks on some others previously described. New species of fossils from the Quebec group in the northern part of Newfoundland, with a few from the Potsdam group. Fossils from various formations in the Silurian and Devonian systems. Species from the Quebec group, published in 1860