374 CORALS AND CORAL ISLANDS. 
Pylstaart’s Island, south of Tongatabu, is a small rocky 
islet without coral. Zafua and Proby are volcanic cones, and 
the former is still active. 
Savage Island, a little to the east of the Tonga Group, re- 
sembles Vavau in its coral constitution and cavernous cliffs. It 
is elevated, according to Williams (pp. 275, 276), one hun- 
dred feet. 
Beveridge Reef, a hundred miles southeast of Savage, is low 
coral, 
f. Samoan or Navigator Islands. —No satisfactory evi- 
dences of elevation were detected about these islands. 
g. Atolls, north of Samoa. 
On account of the high tides (four to six feet), the sea 
may give a height of twelve to sixteen feet to the land. 
Swain’s (Gente Hermosas ?), near latitude 11° 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 de- 
pression at centre, but no lagoon. Probably an elevation of 
two or three feet. This island was named Swain, by Capt. 
Hudson, of the Wilkes Expedition, because not in the position 
assigned to Gente Hermosas. 
Fakaafo, ninety miles to the north, is fifteen feet high. The 
coral reef-rock is raised in some places three feet above the 
present level of the platform. Elevation at least three feet. 
Nukunono, or Duke of Clarence, near Fakaafo, was seen 
only from shipboard. 
Oatafu, or Duke of York’s, is in some parts fourteen feet 
high. Whether elevated or not is uncertain; probably as 
much so as Fakaafo. 
h. Scattered islands farther north, near the equator, east of 
the Gilbert Group. 
Of the Fanning Group, Washington Island, in lat. 4° 41'S., 
