This is a vintage scientific illustration, likely from a biology or marine biology text. It depicts various stages or views of a jellyfish, rendered in a delicate, hand-drawn style. The background is a creamy, aged yellow. The illustration is composed of several distinct drawings of the jellyfish, each labeled with a number (1-4). The jellyfish are outlined in a fine blue line, with some internal details shaded or colored. * **Figure 1** is a larger, more detailed drawing of the jellyfish, showing its bell-shaped body, numerous tentacles, and internal structures. The tentacles are depicted as thin, wavy lines extending downwards. There's a greenish-yellow area at the top of the bell, possibly representing the jellyfish's internal organs. * **Figure 2** is a simplified, almost skeletal view of the jellyfish, focusing on the outline of the bell and the arrangement of the tentacles. * **Figure 3** is a very small, highly simplified drawing of the jellyfish, showing only the basic shape of the bell and a few tentacles. * **Figure 4** is a bottom view of the jellyfish, showing the arrangement of the tentacles and the central mouth opening. Below Figure 4 is another illustration of the jellyfish, similar to Figure 1, but with the internal structures colored in yellow. The tentacles are also yellow, creating a striking contrast with the blue outline. The overall style of the illustration is precise and detailed, typical of scientific illustrations from the early to mid-20th century. The use of color is limited, with a focus on blue and yellow to highlight the different parts of the jellyfish. The text 'PLATE 23' is visible in the upper right corner, and a small copyright notice is present in the lower right corner.