By integrating out the auxilliary metric in the Polyakov string path integral, we derive a path integral for the Nambu action complete with measure. We show how to gauge fix this Nambu form of the partition function. This involves an intermediate partial gauge-fixing step. Our result is the Polyakov path integral in conformal gauge with the correct measure. The intermediate step may enjoy off-shell BRS symmetry by a generalization of the standard procedures. We show how the Teichmüller parameters arise in the Nambu formalism for general genus. These results allow us to make some observations on the physical characteristics of typical string world-sheets.