The image is a detailed, black and white illustration of a diatom called *Triceratium favus*. It's a microscopic organism with a unique, triangular shape. The entire structure is covered in a dense pattern of hexagonal or honeycomb-like cells, giving it a textured appearance. The cells are dark, creating a contrast against the lighter background of the diatom's structure. The diatom is positioned centrally in the image, and the illustration is labeled with the figure number, the name of the diatom, and the magnification level (x600). The background is a pale yellow, likely the color of the paper it's printed on. There are some small specks or imperfections around the edges of the diatom, possibly due to the printing process or the original specimen.