Moved from Millipedes.

I can't tell from the photo whether this is a native North American species of the Parajulidae (Julida) or an introduced European species of the Julidae (Julida).

I've been reading up on millipedes. These round ones are hard to tell apart. I can't be sure if they are Julida or Spirobolida. (Spirostreptida is not an option for your state) However, in the future if you could get a close-up of the side and front of the centipede....they can be distinguished by pairs of legs as the Spirobolida has only one pair of legs on the 5th ring while all other millipedes have two.