1870. ] HANCOCK AND HOWSE—DORYPTERUS HOFFMANNI. 623 
4, Notes on the Guonoey of the Loroten Istanps. By the Rev. T. G. 
Bonney, M.A., F.G.8., Tutor of St. John’s College, Cambridge. 
[ Abstract. | 
THE author described the general appearance of the Lofoten 
Islands, which have commonly been described as composed of gra- 
nite, but which, he stated, really consist of gneissic rocks. ‘The 
scenery of some of the islands on which he did not land resembled 
that of the Cambrian and Cambro-Silurian districts of Wales and 
Cumberland; and the interior of Hassel showed dark rounded fells, 
resembling in outline some of the softer Welsh slates. At Stok- 
marknes and at Melbo there is a granitoid rock of pinkish-grey 
colour, consisting of felspar and platy hornblende, with some mica 
and quartz. The Svolvaer Fjeld in Ost Vaagéd shows a distinctly 
bedded structure in the cliffs near Svolvaer, the débris at the foot of 
which consists of a rock resembling syenite, and a quartzite contain- 
ing a little hornblende and_felspar. Bedding was also observed 
towards the Oxnes Fjord. The islets near this coast consisted 
chiefly of a granitoid rock resembling a syenite, showing traces of 
bedding to the west of Svolvaer. Veins of quartz and seams of 
hornblende &e. occurred in some of the islets; and the latter 
were too regular to be explained by deposition in fissures. Near 
the Svolvaer post-office there was gneiss coarsely foliated, contain- 
ing hornblende and mica, with pink orthoclase felspar. The author 
concluded, from his observations, that, with few exceptions, the so- 
ealled granites of the Lofoten Islands are stratified, highly meta- 
morphosed rocks—quartzites and gneiss, generally with much fel- 
spar in the latter, and with more or less hornblende in both—and 
that they are inferior in position to the gneiss and schists of the 
mainland, and to the more slaty rocks of the southern and western 
parts of the same islands. He compares them with some gneiss 
from Dalbeg on the west coast of the island of Lewis, and thinks 
it highly probable that they also are of Hebridean age. The re- 
mainder of the paper described some raised beaches and moraines. 
The latter are frequent in the Raftsund at the mouth of tributary 
glens, and just above the sea-level. 
5. On Doryprervs Horrmanni, Germar, from the Marl-slate of Mid- 
deridge, Durham. By Auzany Hancock, Esq., F.L.S., and Ricnarp 
Howss, Esq. 
(Communicated by Prof. T. H. Huxley.) 
[Puates XLIT. & XLII. ] 
Wirt the last few years four specimens of Dorypterus Hoffmannt 
have been discovered in the Marl-slate of Midderidge, in the county 
of Durham, by Joseph Duff, Esq., two of them in the year 1865, 
and the other two in the autumn of last year, 1869. <A few traces 
of other individuals were also observed at the same time and in the 
same locality. These are, we believe, the first specimens of this 
