lumbricus terrestris

Nightcrawler (Lumbricus terrestris), an annelid worm also called "common earthworm" and "dew worm"

The only known existing specimen of a fictional species of giant earthworm (Lumbricus terrestris gigantesque) that is wanted for the mysterious disapperances of numerous ships.

Labs, Variation 4 (Further Examinations of Lumbricus Terrestris Fermi)," uses the classic science-fiction device of mutating an innocuous creature into a monstrosity by exposure to radioactivity.