Thank-you to Selwyn and Phyllis for this information.William Shakespeare was a writer and actor who lived from 1564 to 1616. Although he was successful and admired in his own time, it was not until the later part of the 18th century that he came to be thought of as a universal genius.
The Folio, which these lists is based upon, was started soon after Shakespeare's death in 1616. It was concluded 7 years later in 1623 and contained what is considered Shakespeare's collected plays. This means that neither Shakespeare's impressive poetry (e.g. Venus and Adonis, The Rape of Lucrece) nor his brilliant sonnets were found in the 1623 Folio.
We have today knowledge of two lost plays (Cardenio and Love's Labour's Won) and two other plays (Pericles and The Two Noble Kinsmen) which were not included in the 1623 Folio, perhaps because they were collaborative works. Since these lists are based on the Folio, the names from the other plays are not included.