Snails donated to the Wisconsin school system were seized by the Federal government recently, after they were discovered to be giant African land snails (Achatina fulica), according to this report at Yahoo! News. The snails were being used in classrooms at schools in at least three different Wisconsin cities. Giant African land snails are illegal in the U.S., due to their ability to spread meningitis and to become invasive in warmer climates. The last time they were discovered in the wild, in 1966 in the state of Florida, it took ten years to eradicate them.