See United States National Museum Annual Report, 1961, p. 89. Summary Cephalopods, brachiopods, trilobites, and other animals in a coral-reef habitat in the Silurian sea 350 million years ago, near ...

A newly discovered fossil “treasure hoard” dating back some 436 million years to the early Silurian period reveals, for the first time, the complete body shape and form of some of the first ...

The modern Coral animals are chiefly Polyps, but the prevailing Corals of the Silurian age were Acalephian Hydroids, animals which indeed resemble Polyps in certain external features, and have ...

The Silurian hypothesis asks whether it might be possible to find evidence of a pre-human industrial civilization in Earth’s geologic record—even one that might have existed millions of years ...

Twenty-seven graptolite species are reported from the lowermost Silurian (Rhuddanian) ascensus-acuminatus and vesiculosus biozones of Montagne Noire in southwestern France. Four species are left in ...