528 Dr . pallas’s Account of 
found, thefe feem only due to collections of pyritae of no 
great extent, and the flight earthquakes which are fome- 
times obferved about the river Irtifh, and more frequently 
about the lake Baikal, certainly rife in the very neigh- 
bourhood of this lake and of the Noor Saiffan, which 
gives rife to the river Irtifh ; and about thefe lakes never 
any thing like a volcano has been heard of, nor is there 
one known in the Northern part of Aha, except thole in 
Kamtfchatka and the Blands newly-difcovered between 
that peninfula and the continent of North America. 
The fame may be allured of the Urallian mountains, a 
ridge that runs from South to Eaft, and continues to the 
very Northern Ocean and Nova Semlja, being only inter- 
rupted by the Streight of Waygat. It is this ridge of 
mountains that makes the natural limit between Europe 
and Aha, and to the Eaft of which the largeft fhare of 
true remains of elephants, rhinoceroies, and large buffa- 
loes, is found in the banks of all the larger rivers, that 
run from the above-mentioned chain of mountains to the 
Northern Ocean, and yield fuch remains from the places 
where they reach the plains of Siberia (no fuch bones 
being ever found in the higher mountains) to the very 
Ocean; where the frozen earth of the Northern plains 
prelerves thefe remains of Southern animals in fuch per- 
fection, that when I was at Irkuzk, the head and two legs 
of a true rhinoceros were fent from the river Wilui, with 
its Ikin and part of the tendons prelerved on them, 
which are now in the Mufeum of our Academy, and fully 
deferibed 
