Occurrence of larval helminths in Gammarus pulex (L.) from the Braid Burn, Edinburgh

In the course of investigations on larval helminths while working in the University of Edinburgh, I found that Gammarus pulex (L.), which occurred abundantly throughout the year in the Braid Burn, near the Department of Zoology, harboured larval helminths of five different kinds-two species of Acanthocephala, Polymorphus minutus (Goeze) and Echinorhynchus trutt Schrank, two species of cysticercoids new to science, and one form of plagiorchid metacercaria. So far as I am aware, this is the first record of a larval cestode infection in Gammarus pulex (L.) in Great Britain