A few small recently formed mud bars occur along the Galien River in its outer bends. These bars have not yet had time to become forested, and on their outer edges nearest the river there is usually no vegetation, this part being included in the shore habitat. On their older portions next the forest of the flood-plains occurs a thick growth of herbs, several annual grasses, and rarely a willow, _Salix_ sp., or a seedling tree of white elm, _Ulmus americana_, cottonwood, _Populus deltoides_, maple, _Acer rubrum_ or _saccharinum_, and others of the typical flood-plain species. The vegetation during August is very thick, and reaches a height of four to six feet. The soil is either mud or in a few places fine sand, and the ground is quite moist. In this habitat four northern white-footed mice were trapped August 3-4. _Flood-plain forest habitat_: _Scalopus aquaticus machrinus._ Prairie mole. Ridges. _Blarina brevicauda talpoides._ Short-tailed shrew. 4. _Procyon lotor lotor._ Raccoon. 1. _Mustela noveboracensis noveboracensis._ New York weasel. 1. _Peromyscus leucopus noveboracensis._ Northern white-footed mouse. 52. _Microtus pinetorum scalopsoides._ Northern pine vole. 5. _Mus musculus musculus._ House mouse. 2. _Zapus hudsonius hudsonius._ Hudson Bay jumping mouse. 1. _Erethizon dorsatum dorsatum._ Canada porcupine. Tooth marks. _Marmota monax monax._ Southern woodchuck. 4. _Sciurus hudsonicus loquax._ Southern red squirrel. 4. _Sylvilagus floridanus mearnsii._ Mearns cottontail. 1. There are considerable areas of flood-plain along the Galien River, and except for the recently formed mud bars the flood-plains are heavily covered with a mixed forest in which the linden, _Tilia americana_, white elm, _Ulmus americana_, and sycamore, _Platanus occidentalis_, are conspicuous species. Under this forest there are a few small trees, but there is very little underbrush. The herbage also is sparse and, though in a few places there is a considerable growth of ferns, grasses, and sedges, and of other herbs, there are also many bare areas. One of the significant features of the flood-plains, so far as the mammals are concerned, is the flooding to which these areas are subjected during the spring high-water. At that time the flood-plain for a number of days or weeks may be covered with several feet of water.