If you came across a bag containing "two preserved alligator heads, three small animal skulls, an antique lock, a record, and three cds" on the D train, you can relax because it doesn't belong to a serial killer, as the contents might suggest. It actually belongs to a Canadian! Emily Cavanaugh bought the creepy loot as presents at Evolution in SoHo on Monday, but left it on the train when she got off in the Bronx. You can contact her through City Room, and if you're wondering, the skulls belong to a mink, a raccoon and a coyote. And here we thought they were being sent to Animal Care & Control.