Page 226 of my copy of Mythic Adventures has them listed in it. For reference, here's the subtype after being copied and pasted (italics mine).
A creature with this subtype is infused with mythic power and is capable of terrible and awe-inspiring feats. Creatures with the mythic subtype gain the following abilities.
Mythic Rank: A creature with the mythic subtype gains 1 to 10 mythic ranks, representing its overall mythic power. Its rank is generally equal to 1/2 its original CR.
Natural Armor Bonus: Add the creature’s mythic rank to its natural armor bonus. A creature without natural armor has an effective natural armor bonus of +0.
Bonus Hit Points: A creature with d6 Hit Dice gains 6 hit points per mythic rank, a creature with d8 Hit Dice gains 8 hit points per
rank, and a creature with d10 or d12 Hit Dice gains 10 hit points per
rank. Note that this is the same number of bonus hit points the
creature would gain if it had a mythic simple template (as described
in the sidebar on page 225).
Damage Reduction: A creature with 5 to 10 Hit Dice gains DR 5/epic. A creature with 11 or more Hit Dice gains DR 10/epic.
If the creature already has damage reduction, it adds epic to the
qualities needed to bypass that reduction. If the damage reduction
granted from this subtype has a larger numerical value than the
creature’s original damage reduction, increase the creature’s original
damage reduction to the amount of the epic DR. For example, a monster
with DR 5/bludgeoning that gains DR 10/epic from the mythic subtype
gains DR 10/bludgeoning and epic.
Spell Resistance: If the creature has spell resistance, add its mythic rank to its spell resistance.
Mythic Power: The creature gains the mythic power and surge universal monster abilities (see pages 227 and 228). The monster’s
surge die depends on its rank, as summarized in Table 6–5: Mythic
Ability Bonus: At 2nd rank and every 2 ranks thereafter, the monster gains a permanent +2 bonus to an ability score. If it has
multiple bonuses, it can apply them to the same ability score or to
different ability scores.
Mythic Feats: At 1st rank and every 2 ranks thereafter, the monster gains a mythic feat. It must meet all of the prerequisites for
Additional Mythic Abilities: The monster gains a number of mythic abilities equal to its MR + 1. Such abilities can be drawn from the
mythic path abilities in Chapter 1 or the mythic abilities listed with
the monsters in this chapter, or it can be a new ability you create by
taking inspiration from those abilities. These abilities should be
thematically appropriate for the creature.
Some new monster abilities are especially powerful; at the GM’s
discretion, they can count as two abilities toward this total. For
example, the mythic fire giant’s fire vortex ability could count as
two mythic abilities (see page 199).
In place of a mythic ability, the monster may gain a universal
monster ability, such as rend or pounce, either from an existing
Bestiary or from this book.
CR: When you’re finished adding abilities to the monster, add
1/2 the monster’s mythic rank to its CR to determine its new CR.
Evaluate the monster at its new CR using Table 6–8: Monster Statistics
by CR to make sure it falls within the expected values for its new CR.
XP: Change the creature’s XP award to match its new CR (Core