caption: The image shows four different types of oysters on a black background, with the text "Monocondylea nankingensis heude, 1874 USNM 126477" at the top. The oysters are arranged in a collage-like formation, with each oyster having a unique shape and texture. The colors of the oysters range from light to dark, with some having a glossy sheen and others having a matte finish. The text is written in a bold, white font, making it stand out against the dark background.