  We continue the exploration of nonstandard continuum field theories related
to fractons in 3+1 dimensions. Our theories exhibit exotic global and gauge
symmetries, defects with restricted mobility, and interesting dualities.
Depending on the model, the defects are the probe limits of either fractonic
particles, strings, or strips. One of our models is the continuum limit of the
plaquette Ising lattice model, which features an important role in the
construction of the X-cube model.
