It is reported (in a CD liner) that there is an arciliuto in the collection of the Conservatorio di Musica in Bologna which may be the very instrument played by Fillipo Dalla Casa.
I've looked on the conservatoire's website but can find nothing. I'd be grateful for any information about this elusive instrument. MH -- To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html