The tribe may be subdivided into three main groups: (a) The Yuraks in the coast-region from the Yenisei to the White Sea; (b) the Tavghi Samoyedes, between the Yenisei and the Khatanga; (c) the Ostiak Samoyedes, intermingled with Ostiaks, to the S.
For some years a small trade was carried on by the British Captain Wiggins with the mouth of the river Yenisei through the Kara Sea, and after his death in 1905 the Russians themselves endeavoured to carry farther the pioneer work which he had begun.
Asia, the same fauna extending in Siberia as far as the Yenisei and the Lena.
It had long the reputation of being almost constantly ice-bound, but after the Norwegian captain Johannesen had demonstrated its accessibility in 1869, and Nordenskield had crossed it to the mouth of the Yenisei in 1875, it was considered by many to offer a possible trade route between European Russia and the north of Siberia.
The name Ala-tau also enters into the designation of (6), a range between the upper Yenisei and the upper Ob, in the government of Tomsk, namely, the Kuznetsk Ala-tau, forming an outlier of the Altai Mountains, and reaching 6000-7000 ft.
Bering Strait, at 1 The Lena at Verkholensk is navigable for 170 days, at Yakutsk for 153 days: the Yenisei at Krasnoyarsk for 196 days.
The dominance from the Yenisei to the Carpathians of a distinct style of art which, whatever its original elements may have been, seems to have taken shape as far east as the Yenisei basin is an additional argument in favour of a certain movement of population from the far north-east towards the south Russian steppes.
Examples are the Ob and the Irtysh, the Yenisei and the Angara (itself a double river formed by the Angara and the Lower Tunguzka), the Lena and the Vitim, the Argun and the Shilka, while the Amur in its turn receives a tributary as large as itself - the Sungari.
Besides the rivers just mentioned, there are others belonging to the basin of the Yenisei (Khua-or Khi-khem, Bei-khem and Bornkemchik); while yet others belong to the Selenga, a river formed by the junction of the Eder with the Telghir.
The coast-line has few indentations, the chief being the double gulf of the Ob and the Taz, separated from the Sea of Kara by an elongated peninsula (Samoyede), and from the bay of the Yenisei by another.