Histoire naturelle, générale et particulière, des reptiles, A Paris, De l'Imprimerie de F. Dufart, an X-XI 1802-1803, anatomy, evolution, pictorial works, reptiles, The illustration features two distinct aquatic species. The first, labeled as '1. Protè Anguillard,' depicts a long, slender creature resembling an eel, showcasing its elongated body and streamlined form. The second species, labeled as '2. Sirène Lacertine,' presents a more robust and serpentine figure, highlighting its scaly texture and characteristics reminiscent of a lizard or snake. Both creatures are displayed in a detailed and scientific manner, emphasizing their anatomical features for identification and study.