It was a terrible, indescribable thing vaster than any subway
train—a shapeless congeries of protoplasmic bubbles, faintly
self-luminous, and with myriads of temporary eyes forming and
un-forming as pustules of greenish light all over the
tunnel-filling front that bore down upon us, crushing the frantic
penguins and slithering over the glistening floor that it and its
kind had swept so evilly free of all litter.