This is a vintage anatomical illustration depicting a transverse section of a mammal's retina. It's a detailed diagram showing the various layers and cells within the retina. The image is a black and white line drawing, with labels indicating different structures. The retina is shown as a layered structure, with several types of cells visible. There are elongated rod and cone photoreceptor cells, as well as various neurons and fibers that make up the retinal circuitry. The illustration is labeled with letters (A-H) and lowercase letters (a-j) to identify specific cells and structures. The overall style is reminiscent of historical anatomical illustrations, with a focus on detailed representation of the retinal layers and cellular components. The text below the image reads "FIG. 27: Coupe transversale de la rétine d'un mammifère.", which translates to "FIG. 27: Transverse section of a mammal's retina."