Unidentified

Adjective

 * 1) not identified; having an unknown or unnamed  identity.

Thesaurus
able, anonymous, cryptonymic, cryptonymous, enigmatic, incalculable, incognito, incognizable, innominate, mysterious, nameless, puzzling, sealed, strange, unacknowledged, unapparent, unapprehended, unascertained, unbeknown, uncharted, unclassified, undefined, undesignated, undisclosed, undiscoverable, undiscovered, undivulged, unexplained, unexplored, unexposed, unfamiliar, unfathomed, unheard, unheard-of, uninvestigated, unknowable, unknown, unmarked, unnamed, unperceived, unplumbed, unrecognized, unrevealed, unspecified, unsuspected, untouched, virgin, without a name