That which extends from Magellan Strait northwards, is not fully explored, and all that is known of it is that it is principally composed of the same rocks as the Fuegian section, and that the greater part of its upper valleys is occupied by glaciers that reach down to the sea amid dense forest.
Although, in the explored portion of the Fuegian chain, the volcanoes which have been mentioned from time to time have not been met with, there seem to have existed to the south, on the islands, many neo-volcanic rocks, some of which appear to be contemporaneous with the basaltic sheet that covers a part of eastern Patagonia.
Of coast from the Chonos Archipelago south to the Fuegian islands have a climate, closely approximating that of the latter.
The estimated number of Indians living within the boundaries of Chile is about 50,000, which presumably includes the nomadic tribes of the Fuegian archipelago, whose number probably does not reach 5000.
Finally, the Fuegian bark canoe, made in three pieces so that it can be taken apart and transported over hills and sewed together, ends the series.
Belonging to the Fuegian group south of the Straits of Magellan are Desolation, Santa Ines, Clarence, Dawson, Londonderry, Hoste, Navarin and Wollaston islands, with innumerable smaller islands and rocks fringing their shores and filling the channels between them.
The deeply-indented coast line is filled with islands which preserve the general outline of the continent southward to the Fuegian archipelago, the outside groups forming a continuation of the Cordillera Maritima.