In his Report for 1880, Prof. John Collett, Ph.D., State Geologist of Indiana, says:—Of the thirty individual specimens of the remains of the Mastodon (Mastodon giganteus) found in this State, in almost every case a very considerable part of the skeleton of each animal proved to be in a greater or less condition of decay. The remains have always been discovered in marshes, ponds, or other miry places, indicating, at once, the cause of the death of the animal and the reason of the preservation of the bones from decay.