Former New Zealand fast bowler Ian Butler has headed to Otago while left-arm seamer Bradley Scott has taken the return journey to Northern Districts for family reasons.
Otago, the domestic one-day champions, have also acquired 23-year-old South African opening bowler Neil Wagner to fill the void left by Scott.
The former Northern Transvaal representative is due to arrive on October 1 after a stint playing club cricket in England.
Although only contracted for the 2008-09 season, Otago coach Mike Hesson said Wagner was keen to follow compatriot Grant Elliott and one day represent New Zealand.
Canterbury, who have South Africans Kruger van Wyk and Johann Myburgh in the process of qualifying for national team selection, have left one spot open on their 12-man roster.
The top-ranked player in each province earns a $36,500 retainer while the 12th will pick up $19,500 in addition to match fees.
Auckland: Michael Bates, Andrew De Boorder, Colin De Grandhomme, Martin Guptill, Roneel Hira, Paul Hitchcock, Richard Jones, Tim McIntosh, Andrew McKay, Rob Nicol, Lance Shaw, Reece Young.
Canterbury: Corey Anderson, Todd Astle, Hamish Bennett, Leighton Burtt, Andrew Ellis, Brandon Hiini, Johann Myburgh, Michael Papps, Iain Robertson, Shanan Stewart, Kruger Van Wyk, one to be added.
Central Districts: Brendon Diamanti, Bevan Griggs, Greg Hay, Brent Hefford, Peter Ingram, Tim Lythe, Mitchell McClenaghan, Robbie Schaw, Richard Sherlock, Mathew Sinclair, Ewen Thompson, Tim Weston.
Northern Districts: Graeme Aldridge, Simon Andrews, Brent Arnel, Trent Boult, Bruce Martin, Peter McGlashan, Cameron Merchant, Michael Parlane, Bradley Scott, BJ Watling, Kane Williamson, Joseph Yovich.
Otago: Derek de Border, Neil Broom, Ian Butler, Craig Cumming, Mathew Harvie, Nathan McCullum, James McMillan, Warren McSkimming, Leighton Morgan, Craig Smith, Greg Todd, Neil Wagner.
Wellington: Matthew Bell, Harry Boam, Dewayne Bowden, Josh Brodie, Michael Burns, BJ Crook, Grant Elliott, Kevin Forde, Mark Houghton, Chris Nevin, Neal Parlane, Luke Woodcock.
