Tentaculites

Tentaculites, an interesting genus of fossils occurring in the Ordovician, Silurian, and Devonian rocks, and the type of the family Tentaculitidae. The genus has been assigned to the Pteropoda (q.v.), and regarded as the most typical of all the Palaeozoic fossils referred to that class. It seems, however, much more probable that it is a worm-tube from the agreement of its microscopic structure whh that of Cornulites. In England the best specimens Colde from the Wenlock Limestone of Dudley.