Historical illustration, Hexactinellid Sponge, Glass Sponge, Farrea, Sclerothamnus spiralis, Plate 35 from Ernst Haeckel's Kunstformen der Natur, Art Forms of Nature.

AGE • ÂGÉS • ANATOMIC • ANATOMICAL • ANATOMY • ANIMAL • AQUATIC • ART UNIVERSITY • ART • ARTS • BIOLOGY • BLACKBOARD • BLACKBOARDS • BOARD • BOARDS • BOOK TITLE • BOOK TITLES • BOUGH • BRANCH (TREE) • BRANCH • CAPTION • CAPTIONS • CHALKBOARD • CLOSE UP • CLOSE UPS • CLOSE-UP • CLOSEUP • CNIDARIA • CNIDARIAN • CNIDARIANS • DEPICTION • DEPICTIONS • DETAIL VIEW • DETAIL • DETAILS • EARNEST • FAUNA • FIGURE • FIGURES • FLEET • FOREGROUND • GLASS PLATE • GLASS PLATES • GROSS ANATOMY • HEADLINE • HISTORIC • HISTORICAL • HISTORY • ILLUSTRATION • IMAGE MOTIF • JELLYFISH • MACRO SHOT • MACRO • MACROS • MARINE ANIMAL • MARINE ANIMALS • MARINE • MEDUSA • NAME • NAMES • NAT • NATS • NATURAL HISTORY • NATURAL SCIENCE • NATURAL SCIENCES • NATURAL SCIENTIFIC • NATURE STUDY • NATURE • NAVY • OCEAN • OLD AGE • OLD • PERCH • PORIFERA • RAMA • SCIENCE • SCIENCES • SCIENTIFIC RESEARCH • SCIENTIFIC • SCYPHOZOA • SCYPHOZOANS • SEA LIFE • SEA • SERIOUS • SÉVÈRE • SPONGE • SPONGES • SPONGIA • STRUCTURE • STRUCTURES • TEXTURED • TITLE • TITLES • TREE BRANCH • WILDLIFE