25 Intetsteds paa 0en findes en Havn, der kan yde et Skib eller en Baad Ly i alle Slags Yejr.1 Landgang paa 0en er derfor mulig kun naar Spen er forholdsvis rolig, men dette er vistnok en Sjeldenhed, undtagen naar Havisen ligger rundt om 0en. Merkvaerdige ere de to Laguner, der ere adskilte fra Havet ved Volde.af sort Sand, kun nogle faa Meter lioje, et Par hundrede Skridt brede, som fore ferskt Yand og hvis Spejl kun ligger ubetydeligt hojere end Havet. Yestsidens Lagune er saa dyb, at den vilde kunne give en god Havn, • om Tangen blev gjennembrudt i tilstnekkelig Dybde. 0st- sidens Lagune er mindre dyb. Jan Mayen ligger ganske i den ostgronlandske Polar- strprn'. Under 10 til 20 Favne er Havets Yand hele Aaret igjennem iskoldt. Om Yinteren er der ofte aabent Yand ved Jan Mayen; navnlig passere Sselfangerne jevnlig vesten- om 0en. Sommeren er kold, en naturlig Fplge af det iskolde Vand. Den nordlige Del af Jan Mayen er dsekket af evig Sne indtil en Hojde af omkring 700 Meter. Beerenbergs Kegle er snedaekt undtagen paa de bratteste Steder, livor den sorte Fjeldvaeg trseder frem. Beerenbergs Basis er dsekket af en udstrakt Snekaabe, bvorfra vseldige Isbraeer skyde sig ned, af livilke 9 store Brseer naa belt til Havet. Sydlandet synes ikke at vsere glacieret. Store Sne- flekker findes om Sommeren overalt paa Den i Naerheden af Havet. Jan Mayens Flora er fattig. Men'det Gronne mangier ikke, tvertimod danner Mosernes gronne Teppe, der daekker store Partier, en udmerket malerisk Contrast til Berg- arternes sorte, brune og rode Farver. De af Dr. Danielssen paa Ejdet i Syd for Mary Muss Bugten samlede Planter ere, ifolge Bestemmelse af Professor A. Blytt. fplgende: Saxifraga ccespitosa, L. — nivalis, L. — appositifolia, L. — rivularis L. Ranunculus glacialis, L. Halianthus peploides, Fr. Cerastium alpinum, L.? Draba corymbosa, R. Br. Cochlearia officinalis, L. Oxyria digyna, Campd. Catabrosa algida, Fr. Af Pattedyr findes Fjeldrakken, Cams lagopus, i ikke ganske ringe Antal paa Jan Mayen. Den synes at mere sig af Spfugl. Af Fugle bar Hr. Friele noteret fplgende Arter: 1 Lille Sandbugt synes efter Beskrivelsen i Zeespiegel at afgive en god Baadhavn, dsekket af udenfor liggende Skjsergaard. Nowhere on the shores of Jan Mayen has a harbour been found that could afford a ship or a boat shelter in all kinds of weather.1 Hence, to land is possible only with the sea comparatively smooth, which it rarely is save when drift-ice encompasses the island. Specially noteworthy are the two lagoons, cut off from the sea by barriers of black sand, only a few feet high and a couple of hundred paces broad. They both contain fresh water, the surface of which lies but very little above that of the sea. The lagoon on the west side of the island is deep enough to afford a good harbour were the barrier cut through to a sufficient depth. The lagoon on the east side is comparatively shallow. Jan Mayen lies wholly within the Greenland Arctic cur- rent. At a depth of from 10 to 20 fathoms, the temperature of the sea is all the year round below zero. In the winter there is frequently open water off the coasts of Jan Mayen, sealers often passing to the west of the island. The sum- mer is naturally cold, from the presence of ice-cold water so near the surface of the sea. The northern part of Jan Mayen rises, at a height of about 2300 feet, into the region of perpetual irost. The upper cone of Mount Beerenberg is snow-capt, save on the steepest parts of its declivity, where the black mountain- wall is seen ‘protruding. The base of Beerenberg is girt with a belt of snow, from which prodigious glaciers take their origin, 9 of the largest reaching down to the water’s edge. The southern part of the island would not appear to be glaciated. Large patches of snow are everywhere observed throughout the summer in the vicinity of the sea. Jan Mayen has but a meagre Flora. Bright herbage, however, is not wanting; the green carpet of moss, in places of considerable extent, forms a striking and pleasant contrast to the black, brown, and red of the surrounding rocks. The plants collected by Dr. Danielssen on the isth- mus south of Mary Muss Bay. are, according to Professor A. Blytt, as follows: t— Saxifraga ccespitosa, L. — nivalis, L. — oppositifolia, L. — rivularis, L. Ranunculus glacialis, L. Halianthus peploides, Fr. Cerastium alpinum, L.? Draba corymbosa, R. Br. Cochlearia officinalis, L. Oxyria digyna, Campd. Catabrosa algida, Fr. Of mammiferous animals, the Polar fox. Cams lagopus, is by no means rare on Jan Mayen. Of birds, Mr. Friele has noted the following species: — 1 Little Sand. Bay would appear, according to the account in the “Zeespiegel,” to be a good harbour for boats, protected as it is by an outlying chain of islets. Den norske Nordhavsexpedition. H. Mohn: Geografi. 4

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