384 Scientific Intelliyence—Geology and Mineralogy. 
Cape, in which promontory the rock is fine-slaty, rich in quartz, and 
somewhat inclined to gneiss; some of the beds, as at Hornvigen, con- 
taining a little felspar. At the North Cape the dip is from 50° to 80° 
to the ESE. and SE. In the south and east of the island of Magerée, 
the mica-slate becomes gradually changed into clay-slate, so that the 
south-eastern coast of the island is almost to be regarded as a clay-slate 
tract. To the north and especially to the north-east of Kjelvig (in the 
south-eastern portion of Mageroe) there is a district chiefly composed of 
granite ; and to the west of Kjelvig, euphotide occurs in considerable 
quantity. The latter rock is met with on both sides of the Skibsfjord, 
and forms the principal mass of two small portions of country, of which 
the one is surrounded by the mica-slate of the island ; and the other by 
mica-slate, and towards Kjelvig by the rock resembling clay-slate and 
by granite. The euphotide frequently consists of a hard greenish or 
brownish-black serpentinie basis, with imbedded bronzite; but some- 
times consists of a greenstone mixed with smaragdite, which is fine 
granular, and exhibits traces of a slaty structure. The greenstone some- 
times contains no smaragdite, but presents hornblende, which is so de- 
veloped and arranged as to impart to the rock the slaty structure of 
hornblendic gneiss, and to admit of the direction and dip being deter- 
mined. ‘There are complete transitions of all the different varieties into 
one another ; and the euphotide formation passes imperceptibly into the 
bounding granite. The relations of the euphotide to the mica-slate, de- 
scribed by Professor Keilhau, are very curious, but for an account of them 
we must refer to the original work. 
2. Geognosy of Nordkyn in Finmark.—Professor Keilhau states that 
the Kollefjord and the Oxefjord penetrate an endless series of strata of 
mica-slate containing beds of quartz, and having a dip of from eighty 
to ninety degrees to the WNW. These strata and beds extend to 
Nordkyn, and there form the extreme northern point of the mainland 
of Europe. There the quartz predominates ; it is generally coarse and 
splintery ; and is sometimes mixed with mica, but at other times is 
pure. In part it assumes the appearance of sandstone ; for, translu- 
cent, milk-white, distinctly separated grains of quartz, which are some- 
times as large as peas, are more or less closely aggregated together 
in the coarse splintery mass. This is the first indication of a type which 
assumes a very great degree of importance in the series of rocks towards 
the east. The dip at Nordkyn is WNW., and is from seventy to eighty _ 
degrees. The violent surf renders it impossible to land at the extremity, 
which is separated by a fissure from Kinerodden, the high promontory 
of Nordkyn. 
3. Supposed Organic Remains of Kaafjord in Norway.—Some very 
curious round concretions have been found in the hard green slate of 
Kaafjord, and have been regarded as petrifactions; but from the speci- 
mens sent to me, they are evidently not at all of organic origin. They 
are composed of compact greenstone arranged in concentric layers, and 
remind those who have sufficiently studied the mutual transitions of the 
greenstone and the green slate, of the globular diorite of Corsica. A 
rock resembling the Corsican would have been produced at the Kaafjord, 
if the transmutation of the green slate had proceeded a little farther. It 
is, no doubt, the concretions mentioned above which Russegger has de- 
