A whole note and a whole rest.
The whole note (also called a semibreve) is a note that is used in musical notation. This note has a value of four beats in time. It does not have a note stem unlike most other common notes.
- Morehen, John, and Richard Rastall. 2001. "Semibreve". The New Grove Dictionary of Music and Musicians, second edition, edited by Stanley Sadie and John Tyrrell. London: Macmillan Publishers.