The first and last poems in this collection are unnumbered.  
The final lines are "Half a foot long, as reward, your glorious rod, dear poet / Proudly shall strut from your loins, when but your dearest commands, / Nor shall your member grow weary until you've enjoyed the full dozen / Artful positions the great Philainis describes."  The first and last poems in this collection are unnumbered.  The thirteenth describes Priapus summoned to stand next to his mother.  Never intended for publication, Schiller published them in Die Horen.  Erotic rather than mournful, FTP, identify this collection of twenty-four poems by Goethe named for their imitation of Propertius and Catullus.
The final lines are "Half a foot long, as reward, your glorious rod, dear poet
Roman Elegies or R?mische Elegien