Exploration scientifique de l'Algérie pendant les années 1840, 1841, 1842. Paris, Imprimerie royale, 1844-1867, Algeria, animals, natural history, scientific expeditions, Museum of Comparative Zoology, The illustration features a detailed depiction of a cartilaginous fish, specifically a species of skate. Its body is flat and disc-shaped, characterized by prominent pectoral fins that extend laterally, giving it a wide appearance. The tail is elongated and tapers off at the end. Above the skate, supplementary sketches show the creatures head from various angles, highlighting its unique features such as the eyes and mouth. The entire composition is rendered with intricate lines to convey texture and anatomy, while surrounding details provide a scientific context, suggesting a focus on marine biology and the study of underwater life.