The Linvris were a group of nine Goa'uld underlords who tried to overthrow the System Lords. Ma'chello targeted them, using a Goa'uld killing organism that was inserted in a false page turning device for a Goa'uld tablet.
The organism killed the symbiotes while somehow neutralizing the toxin they released, but the hosts went mad and locked themselves in the meeting room they were in, starving to death. SG-1 later found their corpses on PY3-948. (SG1: "Legacy")