  The pasta phases predicted to occur near the inner boundary of the crust of a
neutron star resemble liquid crystals, a smectic A in the case of sheet-like
nuclei (lasagna) and the columnar phase in the case of rod-like nuclei
(spaghetti). An important difference compared with usual liquid crystals is
that the nucleons are superfluid. We develop the hydrodynamic equations for
this system and use them to study collective oscillations. Nucleon
superfluidity leads to important qualitative differences in the spectra of
these oscillations and also increases their frequencies compared with ordinary
liquid crystals. We discuss a number of directions for future work.
