378 
OO 
CORALS AND CORAL ISLANDS. 
thirty acres, and extends almost to the sea. We had no means 
of accurately measuring the height ; but the specimens were ob- 
tained at least three hundred feet above the level of the sea, 
and probably four hundred. The specimens have distinctly the 
structure of coral. The distance from the sea was two to three 
miles.” 
Coral has been reported to occur on the western peninsula 
of Maui, in some places eight hundred feet above the sea; but 
according to C. I. Winslow, the supposed coral does not effer- 
vesce with acids, and therefore is not calcareous. 
On page 324, it is suggested that the westernmost coral 
islands of the Hawaian range, Ocean and Brooks's Islands, 
may have undergone a small subsidence. Should the bro- 
ken wall of emerged rock turn out, on examination, to be 
coral reef-rock, instead of the beach sand-rock, the facts would 
prove an elevation of a few feet, instead of a subsidence. The 
islands differ from Dean’s, in having no long range of wooded 
land on the windward side. 
7. Heejee Lslands.—The proofs of an elevation of four to six 
feet about the larger Feejee Islands, Viti Lebu and Vanua 
Lebu, and also Ovalau, are given in the author’s report on this 
group. How far this rise affected other parts of the group, he 
was unable definitely to determine ; but as the extensive bar- 
rier reefs in the eastern part of the group, rarely support a green 
islet, they rather indicate a subsidence in those parts than an 
elevation. 
j. Islands north of the Feejees.—Horne Island, Wallis, Er 
lice, Depeyster, and four islands on the track toward the 
Kingsmills, were passed by the sloop of war ‘“ Peacock,” of the 
Wilkes Expedition ; but from the vessel no evidences of ele- 
vation could be distinguished. The first two are high islands, 
with barriers, and the others are low coral. Rotuma (177° 


