  In a very recent preprint, Witten showed how to construct a $g|r \, \times \,
g|r$ super period matrix for super Riemann surfaces of genus $g$ with $2r$
Ramond punctures, which is symmetric in the ${\bf Z}_2$ graded sense. He also
showed how it can be applied to analyze supersymmetry breaking in string
compactifications which are supersymmetric at tree-level. Witten's construction
is in the purely holomorphic formulation of super Riemann surfaces. In this
paper, a construction is given in the formulation of two-dimensional
supergravity. The variations of the super period matrix with respect to
supermoduli deformations are also given, as well as an explicit illustration of
how the super period matrix with two Ramond punctures would emerge from a
degeneration of the super period matrix without punctures in higher genus.
