The 1st-level psychic warrior power bite of the wolf [psychometabolism] (Expanded Psionics Handbook 80), in part, says
If you are not a Medium creature, your bite attack’s base damage varies as follows: Fine 1d2, Diminutive 1d3, Tiny 1d4, Small 1d6, Large 2d6, Huge 2d8, Gargantuan 4d6, Colossal 6d6.
Based on your psychic warrior level, your bite increases in ferocity as noted here: at 5th level your bite deals an extra 1d8 points of damage, at 10th level an extra 2d8, at 15th level an extra 3d8, and at 20th level an extra 4d8 points.
Keeping in mind that the Handbook is quite early in the Dungeons & Dragons 3.5 life cycle (Apr. 2004—only 4 months after Complete Warrior, for example), is the extra damage mentioned in the second paragraph actually extra damage as we now understand it—i.e. added after weapon damage and not multiplied on a critical hit—, so that, for example, a Large creature with its bite deals 2d6 + the creature's Strength modifier points of damage plus an extra +1d8 points of damage? Or is that so-called extra damage, like, code for increasing a Medium creature's base bite damage, so that, for example, a Large creature with its bite deals 4d6 + the creature's Strength modifier points of damage?
Or is neither reading of bite of the wolf correct, and I should determine its damage some totally different way?
"Why do you ask?": Well, the phrase your bite increases in ferocity isn't exactly a mechanical game term. Likewise, that extra 1d8 points of damage is exactly the same amount as a Medium creature deals with its bite power normally! Finally, it strikes me as strange that a psion 5 Fine creature's bite of the wolf power would deal 1d2 + the creature's Strength modifier points of damage plus an extra +1d8 points of damage instead of the much easier to determine 2d2 + the creature's Strength modifier. (While the former would be an increase in ferocity, it seems to me a weird increase in ferocity!) Anyway, the war mind 5 giant that possesses this power and the expansion power would much rather see itself—upon achieving Huge size—deal 4d8 + its Strength modifiers points of damage than 2d8 + its Strength modifiers points of damage plus an extra +1d8 points of damage!
I'm certain that this was all hashed out on the Wizards of the Coast forums back in the day and therefore that I'm dreadfully late to the party, but psionics have never been my thing.