Monad, Windows, Species

In another of Leibniz' famous images, he describes a Monad as having "no windows through which anything can enter or depart".  Now, just by imagistic logic alone, 'windowlessness' and 'mirror' suggest a significant inconsistency in his concept of a Monad, plus, the former seems to render his ambition of universal communication vain.  But, to be as charitable as possible, in this case, the absolute internality of the entelechy of a Monad is comparable to that of the conatus of Spinoza's Mode.  Furthermore, DNA can be similarly characterized as windowless, insofar as it sufficiently determines the development of an organism.  Still, genetic make-up is received from other organisms, and includes constituents that are common to all members of its species.  So, similarly, having "no windows" does not preclude that the Life-principle of a Monad is that of the Species.