caption: The image shows a small shell with a label on it sitting on top of a black surface. The label reads "Ranellidae, Apollon a, Bitubercularis lamarck". The shell is a light brown color with a white stripe running along the top and a white center. It has a curved shape with a pointed tip and a small opening at the top. The shell has a glossy finish and is surrounded by a few small bumps and ridges.