Within the depth-psychology corpus, ‘Worm’ occupies a surprisingly dense symbolic field, spanning the chthonic, the mortificatory, the generative, and the cosmological. Jung is the dominant voice, treating the worm across multiple registers: in dream analysis it functions as an apparition from the unconscious whose very destructiveness serves the teleological aim of consciousness-production; in alchemical commentary it coalesces with the serpent and dragon as figures of all-devouring death and underworld transformation, particularly in the putrefactio stage of the opus. Edinger extends this alchemical reading, situating worms as the signature image of mortificatio in both ancient iconography and modern dreams. The Red Book introduces a more numinous register, where the worm appears as a Satanic-divine brother to Christ, a figure of temptation and necessary hospitality. Campbell and von Franz contribute mythological amplification: the Midgard Worm as cosmic adversary, and the palolo worm as a natural symbol of cyclical time and bodily renewal. A persistent tension runs through the corpus between the worm as pure destructive pest and the worm as instrument of psychic necessity—the agent that, in consuming what is ripe for dissolution, forces the emergence of consciousness. This paradox, articulated most sharply by Jung in the 1928–1930 Dream Analysis seminars, is the conceptual hinge on which all other treatments turn.