Annales des Sciences Naturelles Paris Crochard Science Anatomy Periodicals Fossils Mammals, The illustration presents a detailed anatomical study of various skeletal elements, specifically focusing on the jaws of certain species. On the left, a close-up view highlights the intricate structure of a lower jaw, showcasing distinct teeth and jawline characteristics. Adjacent to it, the right section depicts the upper jaw with an emphasis on its profiling, including the alignment of teeth and overall bone structure. Each component is meticulously labeled, providing insights into the anatomical differences and functions of the respective skeletal parts.