It consists of 17 cycles with 72,000 lines in iambic tetrameter or catalectic trochaic tetrameter. Poem 25 by Catullus is in iambic tetrameter catalectic. It is sometimes called catalectic trochaic tetrameter. The poem consists of fifteen rhymed tercets; its prevailing meter is trochaic octameter catalectic. The anapestic (or anapaestic) tetrameter catalectic is used in comedy. The poem is not in pure dactylic tetrameter, but catalectic. Occasionally a line will be catalectic, that is, missing the final syllable. The last stanza "Pie Iesu" abandons rhyme for assonance, and, moreover, its lines are catalectic.