🔭 Die Radiolarien (Rhizopoda radiaria): Berlin: G. Reimer, 1862-1888. Original source Image description: Historic scientific illustration from “Die Radiolarien” (1862-1888) depicting detailed, intricate line drawings of Radiolaria, single-celled marine plankton with ornate, geometric silica skeletons. The image shows various spherical and polygonal structures with spiny protrusions and delicate lattice frameworks. Labeled with numbers and letters, the sketches highlight different views and parts of the Radiolaria species collected during the H.M.S. Challenger expedition. The fine lines illustrate both external skeletal forms and internal structural elements, emphasizing the complexity and symmetry of these microscopic ocean organisms. The illustration serves as a key reference for 19th-century marine biology and expedition documentation.
