HOUTMAN ABEOLHOS ISLANDS. 



151 



eastern extremity down to a point where it turns more abruptly westward 

 toward the entrance to the Wallaby Channel. By walking along the beach 

 (which is a reef-flat) one can obtain a view of an excellent section showing the 

 structure of the island where its height is greatest (see photo, PI. 13, fig. 4). 



Text-fl"ure 5. 



Jand h 







3 

 u~> 



1 



East Wallak y Island, partly from" Admiralty Chart. 



■•.■'.;.';. Reef flat area dotted. 



A&B. indicate position of Sections illustrated (figs. 6 & 7). 

 Spots photographed indicated by letter Rs fig.no. 



(Not all of the Photographs have been reproduced ; those numbered 

 6 and 9 are now 4 and 5 on Plate 13.) 



The two text-figures (text-figs. G and 7) indicate sections at right angles 

 to the line of coastal cliff. They were taken about a \ mile apart. A 

 coral-limestone cliff rises direct from the reef-flat and overhangs somewhat. 



