Princeton University has cancelled the rest of the men’s swimming and diving team’s season after administrators discovered that members had posted “vulgar and offensive” material on the team’s electronic mailing list. The school announced Thursday that Athletic Director Mollie Marcoux Samaan has told the team that it won’t compete in meets scheduled against Navy on Jan. 7 and Harvard and Yale on Feb. 5. They also won’t compete in the Ivy League championship in February.