Harvey Comics is best remembered as a publisher of kids' comics, but like MLJ/Archie, there was a time it dealt in a variety of genres, including horror, giving that up only when the establishment of the Comics Code Authority in 1954 put an end to stories such as the one I present here in its entirety, from Chamber of Chills #7 (April 1952; scans of this public domain title courtesy of ComicBookPlus.com). The gruesome denouement of "Crawling Death" (writer unknown, art by Abe Simon and Don Perlin) got special mention in Wertham's Seduction of the Innocent. Trigger warning for gore.
( Typical human reaction: 'I'm going to kill it!! It might be some rare species!!' )