The forms of the roches moutonné and other evidence afforded by the grooving and fluting of the rocks of this island themselves, go to show that the direction of the glaciating force was from the southward and south-westward and not from the contrary direction. Raised beaches are well marked up to the highest point of the island, about forty or fifty feet above the sea-level. Much of the shingle of the island consists of dolomite of the Manitounuck group, and this fact is a further evidence that the drift in this region came from the southward, since these rocks have, as yet, been found only on the islands and shore of the Eastmain coast between Cape Jones and Cape Dufferin. The islands further out to sea, opposite to this part of the coast are also believed to consist of rocks of the Manitounuck group. Specimens, said to have been broken from the fixed rocks of the Belchers, opposite Little Whale River, were obtained at my request, from the Eskimo and are found to consist of amygdaloid, white and grey dolomite, a soft grey schist and columnar calcspar, the last named apparently from a thin vein. [Sidenote: Appearance of the Ottawa Islands.] All the larger islands of the Ottawa group are bare, rugged and mountainous. The rocks of Perley, Pattee, Gilmour, Booth and Bronson Islands appeared to be all the same as those of the small island which has been described. The surface of the hills, which on Gilmour Island rise to a height estimated to be about 1,800 feet, is everywhere extremely rough and pitted in appearance. [Sidenote: Walruses and white whales.] We found the small island, on which we landed, inhabited by considerable numbers of walruses. Some white porpoises or small white whales (_Delphinopterus catodon_, Linn.) were also seen in the vicinity. The remains of a number of Eskimo camps and part of the skeleton of a large whale were observed on the island. A few pieces of driftwood had been cast upon it. THE LAURENTIAN SYSTEM AROUND HUDSON’S BAY. [Sidenote: Nucleus of the continent.] [Sidenote: Basin of Hudson’s Bay.] [Sidenote: Palæozoic strata.] [Sidenote: Fox Channel.]