Analogous structures in any two animals compared were by Owen defined as structures performing similar functions, but not necessarily derived from the modification of one and the same part in the " plan " or " archetype " according to which the two animals compared were supposed to be constructed.
His homologous structures are now spoken of as " homogenetic " structures, the idea of community of representation in an archetype giving place to community of derivation from a single representative structure present in a common ancestor.
1 While all critics agree in tracing back this form to the earliest years of the 2nd century, and regard it as the archetype of all similar Western creeds, there is great diversity of opinion on its relation to Eastern forms. Kattenbusch maintains that the Roman Creed reached Gaul and Africa in the course of the 2nd century, and perhaps all districts of the West that possessed Christian congregations, also the western end of Asia Minor possibly in connexion with Polycarp's visit to Rome A.D.
What an ancient teacher had said with regard to the worship of Christ as the revelation of the Eternal Father - " Honours paid to the earthly representative are shared by the heavenly Archetype " - was now transferred to the painted image: it appeared as an analogy to the Incarnation.
The archetype of this section existed independently in Greek; for the second Latin and the Slavonic Versions presuppose an independent circulation of their Greek archetype in western and Slavonic countries.