Gatame
(cross or bar choke or kata te jime henka)

"You are sitting astride Uke, who is lying on his back. Your right hand, palm down, grips Uke's collar deep. The forearm passing under Uke's chin. Your left hand takes a firm grip of Uke's left lapel. Take a steady pull on the lapel and bring the little finger cutting edge of your right forearm into contact with the front of Uke's throat. bear down on your right arm to apply the choke."