264 THE CANADIAN NATURALIST. [Vol. viil. 



Some of them are of enormous size ; one near the mouth of 

 English River, of Labrador felspar, was estimated to contain 

 8000 cubic feet ; another, but of smaller dimensions, and com- 

 posed chiefly of Hypersthene, was seen perched on a hill 300 

 feet high, at Cape Porcupine. Mr. Colchester found a boulder 

 of chatoyant Labradorite at the summit of St. John's Island, 

 some 500 feet above the huge erratic just described, lying near 

 the mouth of English River, and three miles distant from it. 

 In the valley of English River were numerous worn and also 

 angular masses of Labradorite of large dimensions. Dr. Packard 

 found domes or bosses of the Upper Laurentian series resting 

 upon probably Lower Laurentian rocks at Square Island, which 

 lies at the mouth of a deep bay, north of Cape St. Michael, 

 and about eighty geographical miles south east of Cape Porcu- 

 pine.* 



Dr. Hunt considers that the domes of Labradorite found by 

 Dr. Packard, not only at Square Island but also at Domino 

 Run, as "probably nothing more than outlying portions of the 

 newer Labrador formation resting upon the Laurentian strata." 

 This conclusion is fortified by the occurrence of Crystalline 

 Limestones of the older Laurentian, described in the first part 

 of this paper, in Hamilton Inlet; and we may regard the great 

 accumulation of Labrador felspar strewed over these older rocks, 

 as the ruins of a vast sheet which formerly covered this part of 

 the Labrador peninsula, and which maintains itself in great 

 force beyond Ukkasiksalik, and exhibits a large development of 

 the most beautiful and delicately coloured varieties in the neigh- 

 borhood of Nain. 



But boulders and angular masses, and masses partially worn, 

 or pan ice-polished where exposed surfaces have been reached, 

 are to be found all along the coast line in sheltered coves ; pos- 

 sibly also outliers, as at Square Island and Domino Run, may 

 be found distributed through the country between these distant 

 points. These however, whether in position or in the form of 

 an assemblage of loose masses, are the remnants of a formation 



* Dr. A. 8. Packard — On the Glacial Phenomena of Labrador and 

 Maine. Memoirs of the Boston Society of Natural History, Vol. I, 

 p. 2, 1867. See also an article by Dr. Sterry Hunt c - On Norite or 

 Labradorite Rock," read before the American Association for the 

 Advancement of Science at Salem, Aug. 1869. 



