A 16-year-old Adelphi girl was killed and a companion was seriously injured Thursday night when they were thrown from a car that ran off a road near the University of Maryland and flipped end over end. Prince George's County police reported.

Laura A. Marshall, of 10515 Edgemont Dr. was fatally injured in the accident that occured in the 8300 block of Adelphi Road at 11:45 p.m., according to county police spokesman Sgt. Robert Law.

Her companion, 16-year old Patricia Atkins of 8507 20th Ct., Adelphi, was in serious condition at Washington Adventist Hospital in Takoma Park a hospital spokeswoman said.

The two girls, students at High Point High School in Beltsville, were passengers in a car driven by a 17 year-old youth, also a student at High Point, Law said.

Police said the car was on the wrong side of Adelphi Road when the accident occurred. The driver told police, according to Law, that he was distracted when he looked into his rear view mirror and swa another car approaching from the rear at high speed.

Police said a witness told of seeing both cars side by side approaching a cheve when one went out of control. Police said they were unable to find the driver of the other vehicle.

Police said Miss marshall was thrown from the car, which flipped end over end came to rest on top of her. They said Miss Atkin was seriously injured when she was thrown from the car onto a nearby driveway.

Police said the driver was taken to Prince George's General Hospital, where he was treated and released.

The youth's father told a reporter yeaterday that his son said he could not remember much of the incident," "only that he was on gravel searching for the two girls." The youth's fatherMiss Marshall was his son's girl friend.