caption: The image shows a page from a book with a drawing of various trilobites on it. The page is filled with detailed illustrations of the different types of shells, each with its own unique shape and size. The shells are arranged in a circular pattern, with some overlapping each other. The colors of the shells range from light brown to dark brown, and some have a glossy finish. The text on the page is written in a bold font and is surrounded by a decorative border.