caption: The image shows a group of six scallops on a black background, with the text "Pecten aequisulcus carpenter, 1864 USNM 1565" at the top. The shells are arranged in a symmetrical pattern, with each shell having a distinct shape and texture. The colors of the shells range from light brown to dark brown, with some having a glossy sheen. The text is written in a bold, white font, making it stand out against the dark background.