Title of a large number of English instrumental pieces
(for viols, lute, or keyboard) based on a cantus
firmus: d f d d d c f g f g a. This cantus firmus
has nothing to do with the Introit "In nomine Jesu" but is quite similar
to the melody of the Vespers antiphon
of Trinity Sunday "Gloria tibi Trinitas." The seemingly wrong designation
is explained by the fact that the species originated with and developed
from the "In nomine Domini" section from the Sanctus of Taverner's "Missa
Gloria tibi Trinitas." This section, like many others of this mass,
employs the melody of "Gloria tibi Trinitas" as a cantus firmus.
The "In nomine" was the most favored type of cantus firmus composition
in England after c. 1550.