On the route of the biological order of the commission for the study of the productive resources of The Yakut ASSR in 1926 in Central Yakutia headed by L. V. Bianchi and A. I. Ivanov
The routes of the Biological Order of the Yakut Complex Expedition of the Academy of Sciences of the USSR for the Study of the Productive Resources of the Yakut ASSR in Central Yakutia conducted in 1926 on the left bank of the Lena were restored. The expedition of the Zoological Institute of the Academy of Sciences of the USSR worked in the Lena valley from Yakutsk to the Aldan River mouth and back to Namskoe (Namtsy) Vill. from June 26 to July 12. Then, from July 26 to September 15 a trip was made to the Lena-Vilyui interﬂuve from Namskoe Vill. through Badarannakh Stn. of the Yakutsk- Vilyuisk tract (highway) and Tit-Ary Stn. on the Lena back to Yakutsk. Geographical coordinates of the collection localities of the zoological materials along the whole route of the expedition are given, many locations being absent from the modern maps.