The sea-lions differ materially from the seals in their geographical distribution. The latter animals, as every casual reader of a natural history text-book knows, inhabit temperate and northern seas. The sea-lions, on the other hand, are found to be absent from all parts of the Atlantic Ocean save its most southern portions. They are common on the South American coasts, and are found inhabiting island-groups which may be regarded as belonging to the same zoological province as the latter continent. The mouth of the River Plate is stated as the most northern boundary of these animals on the eastern side of South America, whilst on the western or Pacific side of the New World they are found on the Californian coasts, and are even met with on the coasts of the Aleutian Isles and of Japan. The Pribylov Islands, included in the Alaska group, are regarded as forming the most northerly point of the sea-lions' distribution; and these islands--now in the possession of the United States--together with the Falkland Islands and the Cape of Good Hope, still form the three chief sources from which the seal-fur or seal-skin of commerce is obtained. It is also well ascertained that sea-lions occur at Kerguelen's Land, on the New Zealand coasts, on the Tasmanian shores, and the east and south coasts of Australia. The average length of a large male sea-lion ranges from six to seven or eight feet, his weight averaging six hundred pounds. The females are of much smaller size than the males, and measure from four and a half to five feet in length; their weight being from one hundred to one hundred and fifty pounds. These animals, as might be expected, grow slowly, and attain their full dimensions the males in six, and the females in four years. The habits of these animals are not only of curious and interesting nature, but evince a decidedly high order of intelligence. The haunts of the sea-lions are, in whalers' _parlance_, named 'rookeries;' and in the disposition of what may be termed their domestic arrangements, as well as in the regulation of their family and personal matters, these creatures appear to be guided by instincts which, like the social order of the ants and bees, are duly perpetuated, and have become of hereditary character. The sea-lions are migratory in habits, and disappear from the majority of the haunts and breeding-places in winter. The males are few in number as compared with the females or 'cows,' as they are termed; and each male receives under his protection a larger or smaller number of females; the oldest males possessing the largest number of dependants. In the early spring, some old males appear to return first to the haunts and do duty as reconnoitring parties; the advance-guard swimming about for several days, then landing and cautiously investigating the state of the land; their shore-visits being spent in a state of perpetual sniffing, and in the careful examination of their old haunt. About a month or six weeks