This is a black and white illustration depicting a diver in the ocean encountering a large, cylindrical marine organism called a pyrosoma, along with several jellyfish. The scene is set in a dark, deep-sea environment. The diver is positioned on the right side of the image, shown in profile. They are wearing a diving suit and helmet, and are descending or ascending a rope. Their body is muscular and well-defined, with visible lines indicating the contours of the suit. To the left of the diver is a massive pyrosoma, a colonial tunicate that resembles a long, translucent tube. It is densely packed with tiny individual organisms, creating a textured, almost fuzzy appearance. The pyrosoma is illuminated, suggesting bioluminescence, and it appears to be floating vertically in the water. Scattered around the diver and pyrosoma are several jellyfish, depicted as translucent, bell-shaped creatures with trailing tentacles. They add to the ethereal and mysterious atmosphere of the scene. The background is entirely black, emphasizing the contrast between the illuminated organisms and the diver and creating a sense of depth and vastness. The style of the illustration is reminiscent of woodcut or engraving, with bold lines and a focus on texture and form. Below the image, the caption reads "PYROSOMA AND DIVER." and "(See page 84.)"