218 bulletin: museum of compakative zoology. 



The loftv dome-shaped islands situated between Nain and Napok- 

 tuLvatsuk as well as all the mainland visible thereabouts are composed 

 of the "abbro. 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. Peculiarly 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 huudred feet of the northern face of Mt. 

 Thoresby. 



The Kiglapait. 



Fifteen miles north of Port Manvers the eastern end of the Kiglapait 

 springs directly out of the sea. The name of this mountaiu-group is 

 :>ii Kskimo 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. 



