The life cycle of <i>Stegodexamene anguillae</i> n.g., n.sp., an allocreadiid trematode from New Zealand

1. A new genus of trematode (family Allocre-adiidae) from the intestine of freshwater eels is described, and named Stegodexamene anguillae . 2. The genus is related to Aephnidiogenes, Lepidapedon and Neophasis , but differs significantly from each of them. 3. The life cycle followed is from the adult in Anguilla dieffenbachii to the redia in Potamopyrgus antipodum (fresh-water gastropod). The cercaria encysts in the eloetrid fish Gobiomorphus gobioides . 4. Progenetic production of eggs and spermatozoa occurs in the metacercariae. 5. Metacercarial excretory spherules are composed of calcium carbonate.