  We report the discovery of two new accreting pulsating white dwarf stars
amongst the cataclysmic variables of the Sloan Digital Sky Survey:
SDSSJ074531.91+453829.5 and SDSSJ091945.10+085710.0. We observe high amplitude
non-sinusoidal variations of 4.5-7% at a period close to 1230s in the optical
light curves of SDSSJ074531.91+453829.5 and a low amplitude variation of
0.7-1.6% near 260s in the light curves of SDSSJ091945.10+085710.0. We infer
that these optical variations are a consequence of nonradial g-mode pulsations
in the accreting primary white dwarfs of these cataclysmic variables. However
we cannot rule out the remote possibility that the 260s period could be the
spin period of the accreting white dwarf SDSSJ091945.10+085710.0. We also
uncovered a non-variable SDSSJ171145.08+301320.0 during our search; our two
observing runs exclude any pulsation related periodicities in the range of
85-1400s with an amplitude greater than or equal to 0.5%. This discovery paper
brings the total number of known accreting white dwarf pulsators to eleven.
