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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 25. 



Mr. Thomson. Long Island to the south of Barn Island I have not 

 visited. It is described in an account of a voyage round Singapore 

 (by Mr. Crawfurd, I think ; long ago published in the * Singapore 

 Chronicle ') as sandstone and clay-slate. 



The alluvial valleys, running into Singapore Plain from the N.W., 

 have been laid down with much care ; and, as Mr. Thomson is well 

 acquainted with the ground, they may be relied on as accurate. Those 

 at the back of the island are also correct, but the exact outlines of 

 the bases of the hills have not been laid down, no land-survey having 

 yet been made of that part of the island, and dense mangrove and 

 other jungles generally concealing the outlines. 



Coral-reefs fringe the south-western shores of Singapore Island and 

 the shores of the islands to the south, the northern coasts of Batam, 

 with the adjacent islands, and a group of small islands in Tilo' Subong. 

 Isolated patches of coral occur also on the eastern coasts of Singapore. 



Explanation of Geographical Affixes used in the Memoir and Map. 



Sunge or Sungei, river, stream. 



Silat, strait. 



Tilo', bay. 



Tana, land. 



Gunong, mountain. 



Bukit, hill. 



Perrnatang, a long elevation. 

 Busong, a spit of sand. 



Tanjong, promontory . 

 Pulau (Pulo), island. 

 Malang, rock above water. 

 Batu, stone, rock. 

 Padang, plain. 



Kampong, a collection of houses. 

 Ayer, water, stream. 

 Pay a, marsh. 



[A few small sections of the rocks of Singapore and the neigh- 

 bouring islands are given in Journ. Ind. Archip. vol. i., in illustra- 

 tion of Col. Low's " Notes on the Geological Features of Singapore."] 



