The whorls are described as non-contiguous, when they do not touch each other; continuous, in the opposite case.
1610s, from Latin contiguus "near, touching, bordering upon," from root of contingere "to touch upon" (see contact). Earlier form, now obsolete, was contiguate (mid-15c.).
contiguous con·tig·u·ous (kən-tĭg'yōō-əs)adj.
Sharing an edge or boundary; touching.