Unusual beach waterfall where the Afon Drywi tumbles over Silurian Grits into Little Quay Bay, New Quay, Ceredigion, Wales, United Kingdom, Europe

The folded Llandovery Series of Silurian rocks at Castell Bach and Bird Rock far beyond, Cwmtydu, New Quay, Ceredigion, Wales, United Kingdom, Europe

Research boat. "Silurian" is the research boat of the Hebridean Whale and Dolphin Trust, based in Tobermory, Isle of Mull. Hebrides, Scotland

Research vessel, Silurian, under sail with observers on the deck and up the mast. Hebrides, Scotland

Research yacht in Tobermory Bay. 'Silurian' is the research vessel of the Hebridean Whale and Dolphin Trust, based in Tobermory. Isle of Mull, Scotland

Whale biologists working from research yacht, Silurian, in the Hebrides, Scotland.

The Florida Ivory millipede (Spirobolida: Spirobolidae) a class of arthropod is thought to be among the first animals to have colonized land during the Silurian geologic period. The millipede's most obvious feature is its large number of legs. contrary to the Latin derivative of their name (thousand foot) the common species have between 80 and 400 legs.