ClipArt ETC
"Actinomma, a radiolarian with a shell and no mouth. A, whole animal with a portion of two spheres of shell removed. B, section, showing relation of protoplasm to the skeleton. c., central capsule; n, nucleus; p, protoplasm; o, openings through which the pseudopodia extend." -Galloway, 1915

Actinomma

"Actinomma, a radiolarian with a shell and no mouth. A, whole animal with a portion of two spheres of…

"Actinomma Asteracanthion, a Radiolarian with a limited number of specialized radii (axes), symmetrically arranged about the center. A, whole animal with portion of two spheres of shell removed. B, section, showing relation of the protoplasm to the skeleton. n, nucleus; p, protoplasm; sk., skeleton." — Galloway

Actinomma Asteracanthion

"Actinomma Asteracanthion, a Radiolarian with a limited number of specialized radii (axes), symmetrically…

"Optical section of a Radiolarian. a, Nucleus; b, wall of central capsule; c, siliceous shell within nucleus; c1, middle shell within central capsule; c2, outer shell in extra-capsular substance. Four radial spicules hold the three spherical shells together." -Thomson, 1916

Radiolarian

"Optical section of a Radiolarian. a, Nucleus; b, wall of central capsule; c, siliceous shell within…

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.