I. Introduction.- A. Occasions for an Investigation.- B. Categories and Categorial Accounts.- C. Programs of Investigation.- D. Legitimacy of This Investigation.- II. A Phenomenology of Mind and Body.- A. Experience of Mind-Body.- B. A Phenomenological Outline of an Ontology.- III. Alternative Accounts.- A. Conflicting Ontologies.- B. Transcendental Requirements.- IV. A Transcendental Ontological Account.- A. A Dialectical Relation.- B. The Dialectic of Mind and Body.- C. Negative and Positive Dialectics and the Identity in Difference.- D. An Answer to the Quid Juris.- V. Ontological and Empirical Structures.- A. Transcendental and Empirical Science.- B. The Mind's Embodiment.- G. Structural Integration and Independence of Mind and Body.- D. Psyche and Soma.- E. Conclusion.