On a closer examination it appeared that this light-phenomenon proceeded from a minute crustacean, which according to the determination of Prof W. LILLJEBORG belongs to the species Metridia armata, A. Boeck, and whose proper element appears to be snow-sludge drenched with salt water cooled considerably under 0° C. First when the temperature sinks below -10° does the power of this small animal to emit light appear to cease. But as the element in which they live, the surface of the snow nearest the beach, is in the course of the winter innumerable times cooled twenty degrees more, it appears improbable that these minute animals suffer any harm by being exposed to a cold of from -20° to -30°, a very remarkable circumstance, as they certainly do not possess in their organism any means of raising the internal animal heat in any noteworthy degree above the temperature of the surrounding medium.
We did not see these animals at Pitlekaj, but a similar phenomenon, though on a smaller scale, was observed by Lieut. BELLOT[267] during a sledge-journey in Polar America. He believed that the light arose from decaying organic matter.
After the Chukches had told us that an exceedingly delicious black fish was to be found in the fresh-water lagoon at Yinretlen, which is wholly shut off from the sea and in winter freezes to the bottom, we made an excursion thither on the 8th July. Our friends at the encampment were immediately ready to help us, especially the women, Artanga, and the twelve-year-old, somewhat spoiled Vega-favourite Reitinacka. They ran hither and thither like light-hearted and playful children, to put the net in order and procure all that was needed for the fishing. We had carried with us from the vessel a net nine metres long and one deep. Along its upper border floats were fixed, to the lower was bound a long pole, to which were fastened five sticks, by which the pole was sunk to the bottom of the lagoon, a little way from the shore. Some natives wading in the cold water then pushed the net towards the land with sticks and the pole, which glided easily forward over the bottom of the lake, overgrown as it was with grass. In order to keep the fish from swimming away, the women waded at the sides of the net with their pesks much tucked up, screaming and making noise, and now and then standing in order to indicate by a violent shaking that the water was very cold. The catch was abundant. We caught by hundreds a sort of fish altogether new to us, of a type which we should rather have expected to find in the marshes of the Equatorial regions than up here in the north. The fish were transported in a dog sledge to the vessel, where part of them was placed in spirits for the zoologists and the rest fried, not without a protest from our old cook, who thought that the black slimy fish looked remarkably nasty and ugly. But the Chukches were right it was a veritable delicacy, in taste somewhat resembling eel, but finer and more fleshy. These fish were besides as tough to kill as eels, for after lying an hour and a half in the air they swam, if replaced in the water, about as fast as before. How this species of fish passes the winter is still more enigmatical than the winter life of the insects. For the lagoon has no outlet and appears to freeze completely to the bottom. The mass of water which was found in autumn in the lagoon therefore still lay there as an unmelted layer of ice not yet broken up, which was covered with a stratum of flood water several feet deep, by which the neighbouring grassy plains were inundated. It was in this flood water that the fishing took place.
After our return home the Yinretlen fish was examined by Professor F.A. SMITT in Stockholm, who stated, in an address which he gave on it before the Swedish Academy of Sciences, that it belongs to a new species to which Professor Smitt gave the name Dallia delicatissima. A closely allied form occurs in Alaska, and has been named Dallia pectoralis, Bean. These fishes are besides nearly allied to the dog-fish (Umbra Krameri, Fitzing), which is found in the Neusidler and Platten Lakes, and in grottos and other water-filled subterranean cavities in southern Europe. It is remarkable that the European species are considered uneatable, and even regarded with such loathing that the fishermen throw them away as soon as caught because they consider them poisonous, and fear that their other fish would be destroyed by contact with it. They also consider it an affront if one asks them for dog-fish.[268] If we had known thus we should not now have been able to certify that Dallia delicatissima, SMITT, truly deserves its name.
In the beginning of July the ground became free of snow, and we could now form an idea of how the region looked in summer in which we had passed the winter. It was not just attractive. Far away in the south the land rose with terrace-formed escarpments to a hill, called by us Table Mount, which indeed was pretty high, but did not by any steep or bold cliffs yield any contribution to such a picturesque landscape border as is seldom wanting on the portions of Spitzbergen, Greenland, and the north part of Novaya Zemlya which I have visited, south Novaya Zemlya has at least at most places bold picturesque shore-cliffs. If I except the rocky promontory at Yinretlen, where a cliff inhabited by ravens rises boldly out of the sea, and some cliffs situated farther in along the beach of Kolyutschin Bay, the shore in the immediate neighbourhood of our wintering station consisted everywhere only of a low beach formed of coarse sand. Upon this sand, which was always frozen, there ran parallel with the shore a broad bank or dune, 50 to 100 metres broad, of fine sand, not water-drenched in summer, and accordingly not bound together by ice in winter. It is upon this dune that the Chukches erect their tents. Marks of them are therefore met with nearly everywhere, and the dune accordingly is everywhere bestrewed with broken implements or refuse from the chase. Indeed it may be said without exaggeration that the whole north-eastern coast of the Siberian Polar Sea is bordered with a belt of sweepings and refuse of various kinds.
The coarse sand which underlies the dune is, as has been stated, continually frozen, excepting the shallow layer which is thawed in summer. It is here that the "frost formation" of Siberia begins, that is to say, the continually frozen layer of earth, which, with certain interruptions, extends from the Polar Sea far to the south, not only under the treeless tundra, but also under splendid forests and cultivated corn-fields.[269] To speak correctly, however, the frozen earth begins a little from the shore under the sea.[270] For on the coast the bottom often consists of hard frozen sand—"rock-hard sand," as the dredgers were accustomed to report. The frost formation in Siberia thus embraces not only terrestrial but also marine deposits, together with pure clear layers of ice, these last being formed in the mouths of rivers or small lakes by the ice of the river or lake frozen to the bottom being in spring covered with a layer of mud sufficiently thick to protect the ice from melting during summer. The frozen sea-bottom again appears to have been formed by the sand washed down by the rivers having carried with it when it sank some adhering water from the warm and almost fresh surface strata. At the sea-bottom the sand surrounded by fresh water freezing at 0° C thus met a stratum of salt water whose temperature was two or three degrees under 0°, in consequence of which the grains of sand froze fast together. That it may go on thus we had a direct proof when in spring we sank from the Vega the bodies of animals to be skeletonised by the crustacea that swarmed at the sea-bottom. If the sack, pierced at several places, in which the skeleton was sunk was first allowed to fill with the slightly salt water from the surface and then sink rapidly to the bottom, it was found to be so filled with ice, when it was taken up a day or two afterwards, that the crustacea were prevented from getting at the flesh. We had already determined to abandon the convenient cleansing process, when I succeeded in finding means to avoid the inconvenience, this was attained by drawing the sack, while some distance under the surface, violently hither and thither so that the surface water carried down with it was got rid of. Frozen clay and ooze do not appear to occur at the bottom of the Polar Sea. Animal life on the frozen sand was rather scanty, but algæ were met with there though in limited numbers.