Ok, so I got another Survival of the Fittest in the mail today.  It is missing the cover, but does not look like a cover was ever stapled to it.  Possibly had a loose cover sheet?  The note about the map being added to the second edition is there, after the designer's notes.  The second-to-last page is the Treasure Vault with items up to 160, and the last page (where the map is on my other one) is a "More Fine Products" list which goes up to 430.  And there is no inkblot on page 19.  

So is this the third printing, and did it have a loose cover?