Mt. Cacagualique Nov, 21 - Dec, 23, 1925 Water mouse fought viciously when I attempted to kill it. Another I found very badly cut up and dead. It had been caught by the tail and apparently died fighting. I have caught Muskrats (Onatra zibethica cinnamomina) which were chewed up in a similar manner obviously by some of their own kind. I saw many small frogs and snails along the streams where I caught the Water mice. They seem to be omnivorous in food habits. No. 10729 - meat and hair of small mammal (the night before I cought a water mouse in the same trap, was eaten, only the hind feet remained in the trap), No. 10778 - starchy substance, No. 10795 - white starchy substance, 10847 - insects. I was unable to determine the contents of most of the stomachs and many were empty.