caption: The image shows three different types of seashells on a black background, with the text "Glyphostoma thalassoma dall, 1908" at the top. The shells are arranged in a triangular formation, with one shell in the center and two on either side. The colors of the shells range from light to dark, with some having a glossy finish and others having a matte finish. The text is written in a bold, white font, making it stand out against the dark background.