BOY SCOUTS IN A SUBMARINEI. LOST ON AN OCEAN FLOOR II. A CONFLICT OF AUTHORITY III. "THE DANDY SUBMARINE" IV. A WOLF ON THE TRAIL V. TWO WOLVES IN A PEN VI. NIGHT ON AN OCEAN FLOOR VII. THE SECRET OF THE HOLD VIII. ON GUARD UNDER THE SEA IX. "JIMMIE'S FOOLISH—LIKE A FOX" X. A CHASE ON THE OCEAN FLOOR XI. JIMMIE GOES OUT HUNTING XII. JACK MAKES A DISCOVERY XIII. JIMMIE DEMANDS A MEDAL XIV. A BOY SCOUT WITH A "PUNCH" XV. A DESPERATE PRISONER XVI. A BLUFF THAT DIDN'T WORK XVII. BAD FOR THE SEA CREATURES XVIII. "MAKING A GOOD JOB OF IT" XIX. ON THE EDGE OF DISASTER XX. AN ENDING AND A BEGINNINGCONTENTS