III. Contributions to the study of the errant Annelides of the older palæozoic rocks

In this communication the author endeavours to elucidate the abundant and obscure organic remains which are found so commonly in the Palæozoic rocks, and especially in the Silurian strata of Britain, and which are generally known by the vague and convenient names of “Fueoids,” “Annelide-burrows,” and “tracks.” After expressing his opinion that the first step towards the study of these obscure fossils lies in the provisional grouping and naming of the more marked forms which are already known to exist, the author proceeds to divide the remains under consideration into two great groups. In the first of these groups are those fossils which are truly the burrows of marine worms, as distinguished from mere trails and surface-tracks.