LOL.
"It was a terrible, indescribable thing vaster than any subway train – a shapeless congerie 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."
Ol' Howard P. Knew his stuff about horror, I will say.