Dr Walker;-
    I rather like your quote of 100,000 species (give or take a few
hundred). The number is nice and round. I also appreciate the
proposition that many species are so far undescribed and undiscovered.
 But I doubt if the undiscovered species living in deep marine waters
will amount to as many as live in shallow biomes. There's not as much
to eat down there. And there probably is more open space for species
to spread out. I'm sure that many undiscovered species live in the
great rain forests;---but again, their numbers must be restricted
only because we have spent a lot of time looking for them already.
      Art