More nitpicky than anything, but...

The aspect of the wolf spell (from the Spell Compendium) is among those having a M/DF component, meaning it can be cast either as a divine spell with a divine focus, or as an arcane spell with a material component, and it has indeed an arcane material component given at the end of the description.

Problem is, it's only a Druid or Ranger spell; it doesn't belong on the spell list of any arcane class, making the arcane material component entry pointless.