  There is a deep analogy between the physics of crystalline solids and the
behavior of superfluids, dating back to pioneering work of Phillip Anderson,
Paul Martin and others. The stiffness to shear deformations in a periodic
crystal resembles the superfluid density that controls the behavior of
supercurrents in neutral superfluids such as He^4. Dislocations in solids have
a close analogy with quantized vortices in superfluids. Remarkable recent
experiments on the way rod-shaped bacteria elongate their cell walls have
focused attention on the dynamics and interactions of point-like dislocation
defects in partially ordered cylindrical crystalline monolayers. In these
lectures, we review the physics of superfluid helium films on cylinders and
discuss how confinement in one direction affects vortex interactions with
supercurrents. Although there are similarities with the way dislocations
respond to strains on cylinders, important differences emerge, due to the
vector nature of the topological charges characterizing the dislocations.
