This is a vintage scientific illustration from 'The Voyage of H.M.S. Challenger' depicting a deep-sea medusa called 'Nauphanta Challengeri'. The illustration is a plate (Pl. 27) and features multiple detailed drawings of the medusa at different stages or sections. The central image (10) is a large, detailed drawing of the medusa, showcasing its bell-shaped body with numerous frilly, petal-like appendages extending outwards. The appendages are intricately drawn, showing their texture and structure. Around the central image are smaller, cross-sectional diagrams (1-9, 11) of the medusa's internal structure. These diagrams are labeled with letters (A, B, C, D) and numbers, indicating different parts and sections. The cross-sections reveal a complex network of canals and chambers within the medusa's body, colored in shades of pink, blue, and yellow. The illustration is drawn in a detailed, realistic style, typical of scientific illustrations from the 19th century. The background is a pale cream color, and the drawings are outlined in black ink. The overall impression is one of scientific precision and artistic skill.