65 
this the land rises more evenly in a southerly direction with 
bare and rapidly decaying hills of nepheline-syenite, between 
which the solifluction gives rise to long, even slopes. 
The cliffs of the coast from Naujakasik to Tupersuatsiak 
consist of typical naujaite. Veins of lujavrite occur locally, but 
they are of quite subordinate importance on this stretch. Well- 
marked and almost horizontal partings divide the naujaite into 
beds of 2—10 meters in thickness. This structure is illustrated 
by the photograph PI. XI, Fig. 2. 
Pegmatites of the пащайе. — The commonest pegmatitic 
segregations in this part of the naujaite area have the form of 
almost horizontal veins or sheets, which run along the parting 
surfaces and as a rule have a thickness of 10—20 centimeters. 
They consist of the same minerals as the naujaite, but in con- 
trast to this do not have a poikilitic structure; their thick fel- 
spar plates, their eudialyte, and their arfvedsonite have almost 
the same size as in the surrounding naujaite, but they are not 
dotted with small sodalite crystals, and we thus obtain the 
impression from a rapid examination, that these pegmatites are 
even more coarse-grained than the naujaite. The sodalite is 
not constantly present, but where it occurs it forms crystals of 
similar size to those of the other constituents (up to 12 centi- 
meters in length); the anhedra of the nepheline are also larger 
than in the naujaite. The sodalite is idiomorphic towards the 
felspar, and the latter is idiomorphic towards nepheline and the 
coloured minerals. Among the last, ainigmatite is sometimes 
specially abundant; the crystals of this mineral frequently lie 
quite embedded in the eudialyte. The largest quantity of 
ainigmalite was found at Tupersuatsiak; here the pegmatite 
veins form small horizontal ledges in the hill and hundreds of 
the ainigmatite crystals could be collected on these ledges. 
Locally eudialyte is also very abundant as large, red anhedra 
enveloping felspar and the other light-coloured minerals. At 
Naujakasik well-formed crystals of the brown variety of eudialyte 
XXXVIII. 5 
