In treating this subject the writer has trusted to nothing save what he himself has seen, for, until these life-studies were made by him, no succinct and consecutive history of the lives and movements of these animals had been published by any man. Fanciful yarns, woven by the ingenuity of whaling captains, in which the truth was easily blended with that which was not true, and short paragraphs penned hastily by naturalists of more or less repute, formed the knowledge that we had. Best of all was the old diary of Steller, who, while suffering bodily tortures, the legacy of gangrene and scurvy, when wrecked with Bering on the Commander Islands, showed the nerve, the interest, and the energy of a true naturalist. He daily crept, with aching bones and watery eyes, over the boulders and mossy flats of Bering Island to catch glimpses of those strange animals which abode there then as they abide to-day. Considering the physical difficulties that environed Steller, the notes made by him on the sea-bears of the North Pacific are remarkably good; but, as I have said, they fall so far from giving a fair and adequate idea of what these immense herds are and do as to be absolutely valueless for the present hour. Shortly after Steller’s time great activity sprang up in the South Atlantic and Pacific over the capture and sale of fur-seal skins taken in those localities It is extraordinary that, though whole fleets of American, English, French, Dutch, and Portuguese vessels engaged during a period of protracted enterprise of over eighty years in length in the business of repairing to the numerous rookeries of the Antarctic, returning annually laden with enormous cargoes of fur-seal skins, yet, as above mentioned, hardly a definite line of record has been made in regard to the whole transaction, involving, as it did, so much labor and so much capital. The fact is, that the acquisition of these pelagic peltries had engaged thousands of men, and that millions of dollars had been employed in capturing, dressing, and selling fur-seal skins during the hundred years just passed by; nevertheless, from the time of Steller, away back as far as 1751, up to the beginning of the last decade, the scientific world actually knew nothing definite in regard to the life history of this valuable animal. The truth connected with the life of the fur-seal, as it herds in countless myriads on the Pribylov Islands of Alaska, is far stranger than fiction. Perhaps the existing ignorance has been caused by confounding the hair-seal, _Phoca vitulina_, and its kind, with the creature now under discussion. Two animals, more dissimilar in their individuality and method of living, can, however, hardly be imagined, although they belong to the same group, and live apparently upon the same food.