170 J.D. Dana on Changes of Level in the Pacific Ocean. 
Namuka has a lagoon or salt lake at centre one and a half miles 
broad ; and there is a coral rock in one part twenty-five feet 
% 
Vavau, the northern of the Group, according to Williams, isa 
cluster of elevated islands of coral limestone, thirty to one hun- 
dred feet in a having precipitous cliffs, with many excava- 
tions along the co 
P ylstaart’ s Gland. south of Tongatabu, is & small rocky islet 
without coral. Tafua and Proby are volcanic cones, and 
former is still active 
Suvage Island, a ‘little to the east of the Tonga Group, resem- 
bles Vavan in its shed rime and cavernous cliffs. Itis 
elevated one hundr 
Beveridge Reef, a ‘toe miles southeast of Savage, is low 
coral. 
f. Samoan Islands.—No satisfactory evidences of elevation 
were — about these islands. 
g. Scatt Islands, north of Si é 
‘These islands are all of coral, dod. cinta! indicate an elevation 
of one to six feet. On account of the high tides, (4 to 6 feet,) 
the sea may give a height of ten or twelve feet to the land. 
Swain’s, near latitude LL° S., is fifteen to eighteen feet above 
the sea, where highest, and the beach is ten to “twelve feet high. 
It is a small island, with a depression at — but no lagoon. 
ne: height proves an elevation of three to six feet. 
Fakaafo, ninety miles to the north, is pane: feet high. The 
coral reef-rock is raised in some places three feet above. the sa 
ent level of the platform. Elevation at least three feet. 
ukunono, or Duke of ans near Fakaafo, was seen only 
from shipboar a 
Oatafu, or Duke of — is in some parts fourteen feet high. 
Elevation dwo or three fee 
Enderby’s and Birnie %, still farther north, are twelve feet 
high. Judging from the double slope of the beach on Enderby; 
this island may have undergone an elevation of two feet, the 
height of the upper slope; yet we think it —— he 
Gardner’s, Hull, Sydney and Newmarket were visited by t 
Expedition, but no satisfactory evidences of slonatts on the io 
three were observed. The last is stated by Captain Wilkes to 
twenty-five feet in height. 
A. feejee Islands.—The proofs of an elevation of four to six 
feet about the larger Feejee Islands, Viti Lebu and Vanua Leb, 
and also Ovalau, are given in our report on this group. How 
* Cook’s Voyage. —Williams, p. 296. + ane of 
St “Soenaane gaan paper 200 Sy bat pt 
<dathealies ression about the centre, 
