The Yablonoi range and its south-western continuation the Kentei are border-ridges of the upper terrace.
4 The lower terrace is obviously continued in the Tarim basin of East Turkestan; but in the present state of our knowledge we cannot determine whether the further continuations of the borderridge of the higher terrace (Yablonoi, Kentei) must be looked for in the Great Altai or in some other range situated farther south.
It appears, however, from Russian explorations during the last third of the 19th North- century, that it has all the characteristics of an elevated western plateau, of a rhomboid shape (like Bohemia), bounded by four mountain ranges; namely, the Russian Altai on the N.W., the Sayans on the N.E., the Kentei range on the S.E., and the Ektagh Altai on the S.W.
In the same way the Kentei (or Gentei) Mountains, as they are called, to the north of Urga, and the Yablonoi Mountains of Transbaikalia, separate the higher terrace of north-west Mongolia (drained by the tributaries of the Selenga) from the lower terrace of the Gobi, which is drained by the upper tributaries of the Onon and the Kerulen, both belonging to the basin of the Amur.
The yearly amount of rain at Urga (altitude 4350 ft., at the northern foot of the Kentei Mountains) is only 92 in., and the average temperatures are: year 27° F., January-18°, July 64°; a minimum of - 35° F.
The former, belonging to the Khalkas, occupy the Gobi and the regions of the Kentei Mountains and Khingan Mountains, while the second, divided into numerous minor branches, roam over south-eastern and southern Mongolia.
Ebisei, who moved from Awata to GojO-zaka in 1688; Eisen and Rokubei, pupils of Ebisei; Mokubei, a pupil of Eisen, but more celebrated than his master; Shuhei (1790-1810), Kentei (1782-1820), and Zengoro Hozen, generally known as Eiraku (1790-1850).