CESTODE • E-FREE TRANSLATION.COM • Definition of Cestode

... Interesting examples of this are to be found in the way in which pearls are formed in various mollusks. In the pearl oysters of Ceylon occur some of the best pearls. If these are carefully sectioned there may usually be found at the center the remains of certain cestode larvae whose presence in the oyster caused it to deposit the nacreous layers that make up the pearl. Other parasites cause similar growths in various shellfish. The great enlargements of the arms or legs or other parts of the body seen ...

— Insects and Diseases - A Popular Account of the Way in Which Insects may Spread - or Cause some of our Common Diseases • Rennie W. Doane