The epistrata and parastrata subdividing a stratum can be considered strata themselves (so that the list is never exhaustive). [TP: 502]
Forms relate to codes and processes of coding and decoding in the parastrata; substances, being formed matters, relate to territorialities and movements of deterritorialization and reterritorialization on the epistrata. In truth, the epistrata are just as inseparable from the movements that consitute them as the parastrata are from their processes. [TP: 53]
These intermediate states present new figures of milieus or materials, as well as of elements and compounds. They are intermediaries between the exterior milieu and the interior element, substantial elements and their compounds, compounds and substances, and between the different formed substances (substances of content and substances of expression). We will use the term epistrata for these intermediaries and superpositions, these outgrowths, these levels. [TP: 50]
A stratum, considered from the standpoint of its unity of composition, therefore exists only in its substantial epistrata, which shatter its continuity, fragment its ring, and break it down into gradations. The central ring does not exist independently of a periphery that forms a new center, reacts back upon the first center, and in turn gives forth discontinuous epistrata. [TP: 50-1]