Debutant off-spinner Nishan Peiris took six wickets Sunday to seal Sri Lanka’s first series win against New Zealand in 15 years with a crushing victory by an innings and 154 runs in the second Test in Galle. New Zealand were all out for 360 in their second innings before tea on day four after being asked to follow-on. Peiris, 27, and fellow spinner Prabath Jayasuriya shared 18 wickets in the match, the latter taking 6-42 in the first innings to bundle out the tourists for just 88 after the hosts had amassed a mammoth 602-5 declared. New Zealand’s lower order did put up some fight after resuming at 199-5, with Tom Blundell, Glenn Phillips and Mitchell Santner all making half-centuries. Peiris, who had taken three second-innings wickets on Saturday, trapped Blundell lbw for 60 early in the first session, ending a 95-run stand with Phillips. Santner helped craft a 64-run partnership for the seventh wicket before the gutsy Phillips fell on 78 when he mistimed a shot to long-on, giving Peiris his maiden five-wicket haul. Santner put together a stubborn ninth-wicket stand of 53 with Ajaz Patel before the latter was sent back, bowled by Jayasuriya, on 22. Sri Lanka sealed the victory when Santner’s gritty resistance was finally broken, stumped by Kusal Mendis for 67 off Peiris.Sri Lanka could have wrapped up the match and series in the morning session but for a succession of dropped catches.