A modern Radiolarian, showing the skeletal structure of silica and the extended fleshy threads or pseudopodia.

Radiolarian

A modern Radiolarian, showing the skeletal structure of silica and the extended fleshy threads or pseudopodia.

<em>Heliosphaera echinoides</em>, a modern Radiolarian.

Radiolarian

Heliosphaera echinoides, a modern Radiolarian.