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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Juiie 25, 



ranges and branches of hills are always narrow and separated by de- 

 pressions, which form salt-water creeks at their mouths and flat allu- 

 vial valleys towards the interior. A subsidence of a few feet would 

 submerge them and restore the original outline of the land, — a system 

 of narrow, elongated, branching peninsulas, alternately swelling and 

 contracting, the several ranges and branches always tending to a par- 

 allelism with the axis of the mainland. Singapore, for instance (ex- 

 cluding the western triangular portion, which is nearly separated from 

 it by the inlets of the Pandan and the Kranji and forms a curious pe- 

 ninsula by itself), would then present five peninsulas running from 

 N.W. by W., where they are connected, to the S.E. by E. for about 

 six miles, when the four to the west would be cut off along a line nearly 

 N. by E. ; while the broadest and most easterly would continue its 

 course in the direction of Tanah Merah Besar, sending off branches 

 to the north-east and forming the bulk of the eastern division of the 

 island * . 



The general direction of the Strait is transverse to that of the hill- 

 ranges, but forms an acute angle with it. In reality, however, the 

 Strait consists of a succession of depressions, each of which nearly 

 coincides in direction with the axes of elevation of the land. The most 

 western of these, about 22 miles long (N.W. to S.E.) and 18 miles 

 broad, stretches from the south-west promontory of the Peninsula to 

 the northern islands of the Bulan Archipelago, and is bounded on the 

 east by the western coast of Singapore and the chain of islets which 

 stretch from its extremity across the Strait to the N.W. point of Ba- 

 tam. The second basin lies between the S.E. coast of Singapore and 

 the N. coast of Batam, both of which it deeply penetrates ; the former 



Feet. 



Perth Hill 82'2 



Kaynan's Hill 987 



Whampoa's Hill 93-0 



Monks Hill 78-4 



Draycott 84-2 



Sheriff's Hill, Sri Minanti 82-2 



Sri Tanglin 86-5 



Mount Marv 1027 



Angus Back Hill 129-4 



Angus House 69*4 



Pearl's Hill 170-9 



Institution Hill 121 '9 



Government Hill 156 5 



Blakang Mati large Hill, or Bukit 



Serapong 301*7 



The elevations of some other hills have been determined also by Mr. Thomson: — 



Feet. 



On the mainland — Gugong Bau 749 



Marubukit 661 



Bukit Santi 645 



On Pulo Bentan (Bintang Island) — GunongBentan... 1212 



Bukit Kijang 759 



* The map shows the configuration of this part of the island well. All the 

 portions represented there as alluvial are flat, and have been silted up in recent 

 periods. 



Feet. 



Mount Faber 300-7 



Hill in front of Mount Faber ... 265-4 



Red Hill 112-0 



Ulong's Hill 129-3 



Mount Zion 45*4 



Peak Island 101-4 



St. John's 189-8 



Blakang Mati little Hill 202-9 



Pulo Brani Hill 161-5 



Bukit Timah 519-1 



Hill behind Green Hill 124-5 



Claymore Chinese Burying 



Ground 74*5 



Hannifasah's House 71'2 



