This is a vintage scientific illustration of an octopus, likely from a zoological or biological publication. The illustration is divided into two parts, labeled 'a' and 'b'. **Part 'a'**: Shows a large octopus with its arms spread out, forming a sort of umbrella or bell shape. The octopus is a pale pinkish-beige color. Its body is rounded, and the arms are covered in small suckers. The texture of the skin appears slightly bumpy or pebbled. The octopus is depicted in a watery environment, indicated by horizontal lines representing the surface of the water. **Part 'b'**: Shows a smaller octopus, viewed from the side. It has a more elongated body and its arms are extended forward. The color and texture are similar to the octopus in part 'a'. **Overall**: The illustration is detailed and appears to be a scientific rendering, likely intended for identification or study. The style is reminiscent of 19th-century natural history illustrations. There is text above and below the illustrations, including the title 'Cephalopodes' and 'Argonauta Argo, Linné'. The background is a pale yellow-beige color.