This issue has variants.
Indicia title is "ATLANTIS, THE LOST CONTINENT, No. 1188." Code number is ATLANTIS O.S. #1188-615. Copyright 1961 by Metro-Goldwyn-Mayer, Inc. Adapted from the movie "Atlantis, the Lost Continent." This edition has 2.25 pages of ads and 3 pages of promos that replace material in the non-ad edition. There is also a "Prizes - Prizes - Prizes! Announcing Big Dell Comics Contest!" banner across the middle of the cover that is not on the non-ad cover.
Inside front cover; black and white. Five photos from the movie and a partial cast list.
This original version of this story in the non-ad edition is 32 pages. In this version, page 3 is deleted. Panels 1, 2, 4, and 6 are deleted from page 15. Panels 1-5 on page 16 are deleted. Panel 1 on page 17 is deleted and panel four is highly cropped and a thought balloon is deleted. Panels 1 and 3 on page 18 are deleted and panel 2 is cropped. The net result is the original four page centerfold now takes up two pages of story with the two-page centerfold being a promo for the Dell Trading Post. Panels on the last page are all cropped to allow for a 1/4 page ad.