In the five years or so since earlier articles on this subject appeared in the Polar Record, much has occurred. The present note, based on Soviet press and radio reports, 1963–68, aims to summarize the most important developments since that time in the region of the west Siberian plain. Administratively, the area under consideration falls largely within Tyumenskaya Oblast'.
(Received February 17 1968)
* Scott Polar Research Institute