Name: Each spell is identified by name. In parentheses after the name is the school (for wizard spells) to which that spell belongs. When more than one is listed, that spell is common to all schools given.
Some spells are reversible (they can be cast for an effect opposite to that of the standard spell). This is noted after the spell name. Priests with reversible spells must memorize the desired version. For example, a priest who desires a cause light wounds spell must petition for this form of the spell when meditating and praying. Note that severe penalties can result if the spell choice is at variance with the priest's alignment (possible penalties include denial of specific spells, entire spell levels, or even all spells for a certain period). The exact result (if any) depends on the reaction of the priest's patron deity, as determined by the DM.
Reversible wizard spells operate similarly. When the spell is learned, both forms are recorded in the wizard's spell books. However, the wizard must decide which version of the spell he desires to cast when memorizing the spell, unless the spell description specifically states otherwise. For example, a wizard who has memorized stone to flesh and desires to cast flesh to stone must wait until the latter form of the spell can be memorized (i.e., rest eight hours and study). If he can memorize two 6th-level spells, he could memorize each version once or one version twice.