The Vermicious Knids are a type of dangerous alien creature in the works of Roald Dahl. They appear as primary antagonists in Charlie and the Great Glass Elevator and get passing mentions in other Dahl stories such as James and the Giant Peach. They are made of muscle and able to stretch their bodies into any form, such as letters to spell out the word SCRAM.
These creatures were of course invented by Roald Dahl, but were they inspired by anything else already existing in sci-fi or fantasy literature? As a related-but-not-exactly-the-same question, what about their name - was the term "Vermicious Knid" taken from or inspired by anything else, or just a typical piece of Dahl nonsense word building?