[Callers] Contra in a Cross

My apologies, searches of my brain and my archives has failed to find the notes I am looking for. Please could someone remind me what name is used to refer to contra lines which cross each other, so that those waiting out at the top don't wait but do a square dance with each other to the same calls? Any links or pointers also much appreciated. Thanks. Happy dancing, John John Sweeney, Dancer, England <mailto:john@modernjive.com> john(a)modernjive.com 01233 625 362 & 07802 940 574 <http://www.modernjive.com> http://www.modernjive.com for Modern Jive Events & DVDs <http://www.contrafusion.co.uk> http://www.contrafusion.co.uk for Dancing in Kent