Two undergraduates were injured early Saturday morning, one seriously, when their car went out of control on the Henry Hudson Parkway in the Bronx and crashed into a concrete abutment.

John W. Lonsdale, Jr. '57, of Lowell Houses and New York City, and Charles S. Cheston, Jr. '56, of Lowell and Blue Bell, Pa., were taken by police to Fordham Hospital, Lonsdale, suffering from bruises, was released Saturday; Cheston's condition was described as "serious, but not critical," by a hospital official.

The students were returning to Cambridge from Briarcliffe College in Briarcliffe Manor, N.Y. The accident occurred, police said, at 3:45 a.m. Saturday, while Lonsdale was driving.

Suffering from a possible skull fracture and a broken nose, Cheston left Fordham Hospital on Saturday while still in serious condition, when his parents thought he was not receiving adequate medical treatment there. X-rays were taken yesterday, at the New York Hospital, where doctors had had not made a definite diagnosis last night.