Indexed from a scanned copy at goldenagecomics.co.uk. Art Ids by Jim Vadeboncoeur Jr. On-sale date is publication date in Catalog of Copyright Entries, 1949 Periodicals, page 201.
There's great big huge monsters all around the jungle
Synopsis
A story-telling monkey becomes a real hero.
Indexer Notes
Two illustrations, each of which has a different job number. One illustration (A-530) is signed Fritz. The other (A-580) just has the distinctive initial F.