218 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
The lofty dome-shaped islands situated between Nain and Napok- 
tulagatsuk as well as all the mainland visible thereabouts are composed 
of the gabbro. There is every probability that the schillerizing phases 
may be found sporadically throughout this great area. They are 
known to occur on the eight hundred-foot Mt. Pikey, southwest of 
Ford Harbor. fPeculiarly sombre in hue, profoundly glaciated and 
almost entirely devoid of vegetation, these great hummocks afford a 
scene of complete desolation almost without parallel even on the barren 
coast of Labrador. 
Gneisses similar to those at Hopedale compose the outer islands 
north of Ford Harbor, but it is probable that the Nain gabbro is 
continuous with another great area that we first met with on Newark 
Island, and afterwards found extensively developed on the mainland 
at Port Manvers. At Black Island Harbor the gabbro is coarse; at 
Port Manvers it is finer-grained. In both cases the composition is 
identical with that characteristic of the Nain occurrence. The rock 
of this northern area has the habit of concentric weathering, boulders 
of disintegration forming great cyclopean walls on the glaciated ledges 
at Port Manvers. The rock seems to be much less resistant to the 
weather than the gneisses. The floors of glaciated valleys in the 
gabbro are invariably occupied with screes of the crumbling rock. <A 
truly imposing example is seen in the long sweeping curve of waste 
that covers the lower fifteen hundred feet of the northern face of Mt. 
Thoresby. : 
Tue KIGLAPAIT. 
Fifteen miles north of Port Manvers the eastern end of the Kiglapait 
springs directly out of the sea. The name of this mountain-group is 
an Eskimo word meaning “ The Great Sierra” and refers to the very 
ragged sky-line and general outlines. The axis of the range runs due 
east and west, parallel to the coast-line which here: has an exceptional 
trend. The sierra is not more than thirty miles in length, but, on 
account of its conspicuous position on the shore, is strikingly pictur- 
esque. Ten distinct and individual summits from two thousand five 
hundred to four thousand feet in height could be counted from the 
schooner. No one of these, so far as the writer has been able to deter- 
mine from missionaries, fishermen, or from the literature, has as yet 
received a name. Here, as in the higher mountains of the north, 
there is abundant opportunity for systematic field-work on the part 
of such an organization as the Appalachian Mountain Club. 
