<em>Macrostomum hystrix</em> (IMAGE) University of Basel Caption Microscopic image of Macrostomum hystrix shows the anterior eyes (1) in the head, followed by the paired testes (2), paired ovaries (3), developing eggs (4), the female genitalia containing three mature eggs (5), and the male genital region in the tail of the worm (6). Credit (Image: Lukas Schärer) Usage Restrictions Give adequate attribution to the original author 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.