From Cuvier onward, on the other hand, it multiplies itself, adds up diverse forms, reverberates and is diffused throughout the organism, isolating it from all the others in various simultaneous ways; for it no longer resides in the interstices between beings in order to connect them together; it functions in relation to the organism itself, so that it can 'integrate' with itself and maintain itself in life; it does not fill up the interval between beings with successive tenuities; it makes it deeper by making itself deeper, in order to define in isolation the great types of compatibility.