234 



'ALBATROSS" TROPICAL PACIFIC EXPEDITION. 



/- 



A 



Section across Sink, S. W. to N. 



is surrounded by a wide reef flat platform from 100 to 130 yards in width, 

 cut away from the flanks of the elevated coralliferous limestone slopes of 

 the island. The topography of the island as shown from the figure is 

 quite irregular; there are three main lines of hills, the higher parts of 

 which are about 220 feet high. Above high-water mark is a low platform (the 

 first terrace ?), ranging in width from 30 to over 400 yards. On this most 



of the natives dwell. 



■/>-!>.:u.^.,s....:u».^°-~s-T--^^ — -T'-^sp-^'-.^.^ Near the southwest 



end of Pleasant Isl- 

 and is a shallow la- 

 goon, a sink 100 by 

 200 yards with about 

 5 feet of water, en- 

 closed by a regular 

 rim ; as is seen by the 

 sketch map and sec- 

 tion of the adjoining 

 figure, numerous 

 gaps occur between 

 the higher parts of 

 the rim. The above 

 data are taken from 

 a report by Mr. F. 

 D. Powers to the 

 Pacific Islands Com- 

 pany limited. 



This island was 

 visited by Kramer, 



Pleasant Island (Nauku). 



who gave a short account of it in Globus.' I am indebted to Mr. Hiitter 

 for photographs of Nauru showing the massive bluffs of elevated corallif- 

 erous limestone a short distance from the shore, and to him as well as to 

 Mr. John Arundel for specimens of the limestone, which is identical with 

 that of similar elevated islands like Nine, Eua, Vavau, and others. 



1 Globus, Vol. LXXIV. No. 10, September, 1898. 



