D. Jacob Christian Schäffer's Abhandlungen von Insecten, Regensburg, Verlegts Johann Leopold Montag, 1764-1779, insects, parasites, This illustration displays a variety of microscopic marine organisms, meticulously labeled and arranged for scientific study. The layout features several distinct figures, each representing different species or anatomical structures, including tiny crustaceans, marine larvae, and other fascinating creatures. The detailed depictions highlight the intricate features of these organisms, such as appendages and body segmentation, emphasizing their diversity and complexity. Additionally, a central structure, resembling a large, ornate stalk or siphon, stands out, possibly serving as a reference point for the various organisms surrounding it. The careful labeling aids in the identification and classification of these microscopic life forms, illustrating their significance within aquatic ecosystems.