Three rarely-performed musicals -- Harrigan 'n Hart, Carmelina (retitled Someone in April) and Oh, Captain -- will be presented Off-Broadway on three successive September weekends on the "Musicals in Mufti" series at York Theatre in New York.

Shows are presented in staged concert versions in mufti (i.e. street clothes).

* Harrigan 'n Hart (1984) tells the story of the legendary songwriting/performing team popular among working-class theatregoers in late 19th century New York. It has music by Max Showalter, lyrics by Peter Walker and book by Michael Stewart. Sept. 13-15.

* Carmelina (1979) has music by Burton Lane (Finian's Rainbow) and lyrics by Alan Jan Lerner (My Fair Lady) but this musical about an Italian woman who has led three American GI's to think she they were the father of her child had a very short run originally. Sept. 20-22

* Oh, Captain! (1958) helped launch the career of Tony Randall. Jay Livingston and Ray Evans wrote the score for this story of an English sea captain who leads a quiet, respectable life in England -- but lives the high life in Paris with a voluptuous nightclub singer when he's supposed to be away at sea. Sept. 27-29 Tickets cost $20. Performances are given at the Theatre at St. Peter's Church in New York. For tickets or information: (212) 935-5820.

-- By Robert Viagas