Peterson 1935. ground line. Such arrangement is to cause beaver to drown upon being caught + thus avoiding escape by breaking or chewing off foot in trap. Pre- paration of beaver caster smeared on shaved piece of willow & serve as attraction. Stick placed beyond trap on bank. July 7. First trap set was sprung, no evidence whatever of visitation by any animal. Second trap set (first place I located recent evidence of willow-cutting) contained a large #6 1/2 lb. male beaver. Animal was drowned, but evidence pointed toward a long + desperate struggle to escape. Left forefoot was almost completely severed - only one tendon still intact. Bones, ulna + radius, broken off squarely, not chewed off. Drowning due to beaver wrapping trap chain about pole driven into bottom in midstream, not a mechanical arrangement itself conventionally used to cause drowning. Animal skinned by Dr. Hall, fleshed, skin put on stretcher to dry. Entire skeleton saved. No ectoparasite collected. Examined for endo parasites with following finds: red, 12-15 mm. roundworms in stomach, flukes about 8 mm. x 15 mm. with two suckers - one anterior, one posterior - found mostly attached to walls of cecum and large