than the region now in question. This seems to me to show that the insect fauna of Spitzbergen, exceedingly inconsiderable and limited in numbers as it is, has migrated thither in comparatively recent times, and in how high a degree the migration of beetles is rendered difficult by their inability to pass broad expanses of water.
By afternoon the air had again cleared somewhat, so that we could sail on. A piece of ice was seen here and there, and at night the ice increased for a little to an unpleasant extent. Now, however, it did not occur in such quantity as to prove an obstacle to navigation in clear weather or in known waters.
On the 12th August we still sailed through considerable fields of scattered drift-ice, consisting partly of old ice of large dimensions, partly of very rotten year's ice. It formed, however, no serious obstacle to our advance, and nearer the shore we would probably have had quite open water, but of course it was not advisable to go too near land in the fog and unknown waters, without being obliged. A large number of fish (Gadus polaris) were seen above the foot of a large block of ground ice, near which we lay-to for some hours. Next day we saw near one of the islands, where the water was very clear, the sea-bottom bestrewed with innumerable fish of the same species. They had probably perished from the same cause, which often kills fish in the river Ob in so great numbers that the water is infected, namely, from a large shoal of fish having been enclosed by ice in a small hole, where the water, when its surface has frozen, could no longer by absorption from the air replace the oxygen consumed, and where the fish have thus been literally drowned. I mention this inconsiderable find of some self-dead fish, because self-dead vertebrate animals, even fish, are found exceedingly seldom. Such finds therefore deserve to be noted with much greater care than, for instance, the occurrence of animal species in the neighbourhood of places where they have been seen a thousand times before. During my nine expeditions in the Arctic regions, where animal life during summer is so exceedingly abundant, the case just mentioned has been one of the few in which I have found remains of recent vertebrate animals which could be proved to have died a natural death. Near hunting-grounds there are to be seen often enough the remains of reindeer, seals, foxes, or birds that have died from gunshot wounds, but no self-dead Polar bear, seal, walrus, white whale, fox, goose, auk, lemming or other vertebrate. The Polar bear and the reindeer are found there in hundreds, the seal, walrus, and white whale in thousands, and birds in millions.[190] These animals must die a "natural" death in untold numbers. What becomes of their bodies? Of this we have for the present no idea, and yet we have here a problem of immense importance for the answering of a large number of questions concerning the formation of fossiliferous strata. It is strange in any case that on Spitzbergen it is easier to find vertebræ of a gigantic lizard of the Trias, than bones of a self-dead seal, walrus, or bird, and the same also holds good of more southerly inhabited lands.
On the 13th August we again sailed past a large number of small rocks or islands. The sea was at first pretty free of ice, but was afterwards bestrewed with even, thin pieces of drift-ice, which were not forced up on each other, and thus had not been exposed in winter to any ice-pressure. This ice did not cause any inconvenience to the navigation, but at the same time all was wrapt in a very close mist, which soon compelled us to anchor near the shore in a little bay. I endeavoured without success to determine the position of the place by astronomical observations. Along the shore there still remained nearly everywhere a pretty high snow and ice-foot, which in the fog presented the appearance of immense glaciers. The land besides was free of ice. In respect of its geological formation and its animals and plants it resembled completely the island I have just described. But the sea-water here was clear and salt, and the dredging therefore yielded to Dr. Kjellman some large algæ, and to Dr. Stuxberg a large number of marine evertebrates.
When the fog lightened, we immediately steamed on, but we had scarcely got to sea before we were again wrapped in so close a fog that we were compelled to lie-to for the night beside a large piece of drift-ice. The hempen tangles were used, and brought up a very abundant yield of large, beautiful animal forms, a large number of asterids, Astrophyton, Antedon, &c. There was besides made here an exceedingly remarkable, and to me still, while I write, a very enigmatical find.
For several years back I have been zealous for the examination of all substances of the nature of dust which fall to the surface of the earth with rain or snow, and I have proved that a portion of them is of cosmic origin. This inconsiderable fall of dust is thus of immense importance for the history of the development of our globe, and we regard it, besides, with the intense interest which we inevitably cherish for all that brings us an actual experience regarding the material world beyond our globe. The inhabited countries of the earth, however, are less suitable for such investigations, as the particles of cosmic dust falling down here in very limited quantity can only with difficulty be distinguished from the dust of civilization, arising from human dwellings, from the offal of industry, from furnaces and the chimneys of steam-engines. The case is quite different on the snow and ice-fields of the High North, remote from human habitations and the tracks of steamers. Every foreign grain of dust can here he easily distinguished and removed, and there is a strong probability that the offal of civilization is here nearly wholly wanting. It is self-evident from this that I would not be disposed to neglect the first opportunity
