266 Proceedings of the Royal Society of Edinburgh. [Sess. 
Metamorphosed igneous rocks are represented by an angular specimen 
(8 + 4 + J inches) of sheared fine-grained grey felsite with small ochreous 
spots, and three small specimens of flaser chloritic epidiorite filled with 
carbonates, one of which is angular and the others glaciated. 
An assemblage of rocks such as those referred to under heading 2 of the 
Metamorphic series occurs all along the Highland border in Scotland, and 
in the Londonderry, Donegal, and Connemara regions of Ireland. Green and 
purple slates of Carboniferous age also occur in the south-west of Ireland 
along the line of country affected by the Hercynian system of folding. 
(c) Igneous Rocks . — Among the material from this Station there are 
about fifty fragments of igneous rock, ranging from 2 to 4 inches in 
greatest diameter. Of these more than one-half are holocrystalline and 
intrusive, while twenty-one are lava-form and one fragmental. 
Among the holocrystalline rocks are seven small specimens of granite, 
two of which are glaciated, four angular, and one rounded. According to 
Dr Flett, who has examined them microscopically, they resemble the 
“ Newer ” granites of Scotland and Ireland, and are unlike those of Tertiary 
age. One angular specimen (4 inches in diameter) of nephiline syenite, 
unlike any known rock of the kind in Western Europe, has been described 
by Lady MacRobert, who states that “ it cannot at present be compared 
with any known syenite of the North Atlantic basin.” * -f 
Two small fragments of lamprophyre resemble the dyke rocks which are 
so plentifully distributed round the plutonic centres in Scotland and Ireland. 
Twenty specimens of dolerite occur, mostly angular and with sharp edges 
and angles ; five only are glaciated, and one, of rather different type from the 
others, is egg-shaped and well rolled. Rocks like these occur plentifully 
in southern Scotland, in the north of Ireland, and also in the south of 
England. 
The effusive or lava-form rocks are chiefly olivine-bearing basalts, and 
are usually amygdaloidal. There are twenty small specimens, mostly 
showing irregular fracturing, and only five of them are glaciated. Similar 
rocks occur in the Tertiary Volcanic Plateau in North Ireland. 
Among the material is a square block of spongy fragmental rock, 
enclosing pieces of pumice and numerous insect fragments, that may have 
been floated off from some oceanic island and carried by the warm-water 
current, and, becoming waterlogged, sunk at this locality. 
* Geol. Mag. (Jan. 1912), Dec. V., vol. ix. p. 1. 
t Professor Kamsay of Helsingfors, who saw the specimen, mentioned to me in conversa- 
tion that he had this year (1911) observed a similar rock in place in the east of the Kola 
Peninsula. 
