Science: Three-eyed Mariner

In Harbury, England, is a limestone quarry which has served as a tomb for at least two denizens of primeval seas. Last February the fossil remains of a mammoth reptile were found there. Last week many a paleontologist hastened to Harbury to see another monstrous skeleton which had just been unearthed at only 300 yards distance from the first discovery.

The skeleton was thin, undulating, crumbling. The shattered bones of the gangling creature stretched 26 feet; projecting from the body were four chipped, broken appendages. These, the paleontologists decided, had been paddles. They...