e 48 76. Valdai Hills. Where are the Valdai hills? Where does the Volga river rise ? Into what sea does the Volga flow ? The Valdai hills rise only a little above the great plain of Europe. They contain the sources of many large streams. The Volga river rises in a marsh in the hill re- gion, and flows into the Cas- pian sea. The basin of the Volga is the largest river basin in Europe, : but it ‘BRITISH ISLES. ‘The Caspian sea is often swept by cold winds from the north. In winter the mouth of the Volga is closed by ice. During the open season many vessels trade at the ports by the sea and on the rivers. The Caspian sea and the streams that flow into it are very rich in fish. Among these is the sturgeon. This fish often grows to the length of ten feet. Part of its body is covered with bony plates. Its mouth is small and tooth- less, and is under the long snout. Many. thousand people earn their living by catching fish in this sea and in the streams that is not one half so large as that of the Mississippi. What: seas receive streams from the region of the Valdai hills? The vast plain that spreads round the Valdai hills is crossed by a network of canals. These connect with the rivers, and form the main highways of trade. The canals reach lumber and fur regions on the north, rich mines of gold andisilver in the moun-. tains that lie to the east, and. Rntile exainnelde on. all sides. In return for the Saeduas of these regions, the canals carry cloth, tea, sugar’and farming tools to the people of the plain. 77. The Caspian Sea. The Caspian sea is the. largest body of water havimg no outlet to the ocean. flow into: it. Sturgeon Fishing. 78. British Isles. What islands are west of the mainland of Europe? . A. few low ranges cross the British Isles. These. are the most important islands on earth. The ‘trade between the people of the: British Isles and of the United States is very large. : Ben-Nevis is the highest mountain in the British Find it on the key map, page 47. : Isles. Its area is much larger than that | of the Great Lakes of North America. The Caspian sea is ate and its | surface is a little below the level | of the ocean. Ben-Nevis, Scotland. A Highland Cottage.