<i>Margaretia oesia</i> (IMAGE) St. John's College, University of Cambridge Caption This is and artist's impression of Oesia in the perforated tube that scientists believe it inhabited. Credit Drawing by Marianne Collins Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.