Guirintana.
See also the sixteenth century dance, Chiaranzana.
Very roughly:
12 (or perhaps more) couples in a column.
They start dancing
Change to piva:
Snake figure
"Take hands and go around each other in the manner of a snake" might mean all sorts of things.
Arches
Continuing with piva, without releasing hands, the first couple goes through the middle of the second couple. Then either they go through the middle of the third, or the third goes through the middle of the first.
Then it continues, "step by step".
That sounds like either:
Turning
Four tempi of piva
Brigamania ... ?
The end.
This looks (broadly) very like the Chiaranzana described by Caroso much later in the 16th century.
The "brigamania" appears to be an unknown term - it certainly isn't meaningful to me, alas.
Katherine Davies, 2015, from edition of Siena MS in Smith.
Balleto called chirintana for twelve, danced in couples.
First they do two continentie with a passo doppio with another continentia and they should do this as many times as the musicians wish then they will take both hands in couples with tempi of piva they will go one around the other in the manner of a snake then the first couple holding hands departs with some more tempi of piva going through the middle of the second couple and the third through the middle of the first [or first through third - it's not clear] and so step by step then they take hands and do four tempi of saltarello of piva turning the one around the other and this done they do it another time then they take hands and do the brigamania.
The end.