caption: The image shows a group of four different types of seashells on a black background, with the text "Melania Corolla Gould, 1847, Holotype USNM 5449" written on it. The shells are arranged in a symmetrical pattern, with each one having a unique shape and texture. The colors range from light brown to dark brown, with some having a glossy finish. The text is written in a bold, white font, making it stand out against the dark background.