Cold, damp, slippery, blood-sucking, Dreamworld creatures with membranous wings. They haunt the slopes Ngranek-Kla at night. They have horns, cold rubbery arms, ugly prehensile paws, barbed tails, and silent bat wings. It spreads its wings and smothers its victims.
("The Dream-Quest of Unknown Kadath") ([P.Rev.] "The Horror in the Museum")