of the most important facts that has been established by modern investigation of the sea is, that there is no region in its vast extent that is devoid of life. Strange animals are found at the greatest depth the trawls of man have penetrated, and very wonderful are some of the forms of life found. The three great laws of nature are self-protection, food, and reproduction, and here the sea has wonderful tales to tell. Some sea animals reproduce by simply dropping a piece of their body, and other forms of marine life are so low that we can barely understand that it is life. There is a fish which hides from enemies by shaking its fins in such a manner as to scatter a considerable quantity of sand over its body. Another fish poisons its enemies; another gives a strong electric shock. Many fish are colored like the bottom of the sea, to escape their enemies; others resemble sea-*weeds. And the sea is a vast slaughter-house; fish feed upon one another, and constant warfare is going on. The whelk attacks and devours animals as large as itself; hidden in the recesses of the whelk's mouth there is a ribbon beset with numerous sharp little teeth, which, by a complicated mechanism, can be worked backwards and forwards in such a manner that it can bore a hole through very thick and dense shells; and, the soft parts being reached, a tube is protruded which dissolves and sucks them up into the animal's stomach. Certain of the cuttle-fishes, as they pass slowly through the water from one point to another, are able to change the color of the skin so as to resemble the color of the rocks or weeds which are below them. Another very interesting feature presented by these animals is their ability to discharge suddenly a cloud of inky substance
