Abstract
A new species of acanthocephalan, Pseudorhadinorhynchus samegaiensis (Echinorhynchidea, Illosentidae), was found from the intestine of 2 years old rainbow trout cultured at Samegai Trout Experimental Station, Shiga Prefecture, in May, 1974. Sixty-seven males and 101 females were collected from 29 of 35 fishes examined. Acanthocephalans were fixed in 70% ethanol under pressure, stained with Heidenhain's hematoxylin and mounted in balsam. Type specimens are deposited in the collection of the National Science Museum, Tokyo.
