Snail (IMAGE) American Chemical Society Caption A juvenile snail shell of Biomphalaria glabrata, 4 weeks after hatching with a shell diameter of 3 mm. Credit American Chemical Society 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.