The only secondary school in the nation with its own private zoo announced that an endangered ruffed lemur - a monkeylike primate - has given birth to quadruplets.

The birth of four black-and-white ruffed lemurs was proudly announced Friday by the Trevor Teaching Zoo, situated on the sprawling 600-acre grounds of the Millbrook School, an exclusive prep school in Dutchess County, N.Y., perhaps best known as a filming site for "The World According to Garp."Lemurs, of which there are 22 varieties, are tree-dwelling primates related to monkeys, assistant zoo director Mark Cartland said.

All 22 species of lemur are found exclusively in the forests of Madagascar, he said.

Cartland described ruffed lemurs as having "long tails and big chunks of black and white patches. Their pattern is particular to individuals.

"It looks like we had three males and one female. It's hard to tell in young animals. Even when they're a year old its difficult to tell," he said.

"Lemurs are an endangered species," Cartland said. "They're from Madagascar and the rate of forest depletion is tremendous. Most of the wildlife in Madagascar is in trouble."

However, he said, the animals breed well in zoos. Indeed, both the mother and father were born in captivity in Millbrook, Cartland said.