Before revision:  The situation is more complex when considering multiple flagellaon a single cell. Specifically, the unicellular biflagellate Chlamydomonasswims with opposing power strokes, yet synchronizes in phase in the familiar breaststroke. This indicates{\it   that a mechanism, internal to the cell, provides an additional flagellar coupling.
After revision:  The situation is more complex in URLanisms bearing few flagella. We show that flagella of{\it that a mechanism, internal to the cell, provides an additional flagellar coupling.