Source : Webster's Revised Unabridged Dictionary (1913)

Sculler \Scull"er\, n.
   1. A boat rowed by one man with two sculls, or short oars.
      [R.] --Dryden.

   2. One who sculls.

Source : WordNet®

sculler
     n : someone who sculls (moves a long oar pivoted on the back of
         the boat to propel the boat forward)