Based upon new collections from the type locality and an interpretation of the original description,
Polydora cornuta Bosc, 1802, is redescribed. The species is interpreted to be the same as
Polydora ligni Webster, 1879, a well-known estuarine species. A neotype has been selected from the new collections and an illustrated description of
P. cornuta prepared.
Polydora ligni becomes a junior synonym of
P. cornuta.