Feature type: river
Segment grid: 3B4-4B5
Despite its length and prominence, the river is nowhere named. There is space for the name near the mouth.
For a short distance immediately to the left of the ROMA symbol (4B5), the river course appears to be split into two. The copyist evidently considers the lower of these courses to be erased; hence his willingness to write over it.
Later, the course is interrupted briefly at the bottom of the ROMA symbol.