Eardrum Arrangement (image) University of the Witwatersrand Share Print E-Mail Caption This image depicts theories on eardrum arrangement in cynodonts. A, behind the jaw joint; B, on the posterior portion of the jaw; C, two discontinuous eardrums; D, two continuous eardrums. Credit Wits University Usage Restrictions None Share Print E-Mail 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.