62 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
and denudation, and the accompanying weathering, had been more in- 
tense as we proceeded southward along the windward islands of Fiji. 
The islets and rocks remaining as evidence of the former connection of 
the islands of this group are perhaps as good illustrations as any we 
have seen of the process which has been going on to reduce to its present 
proportions the original reef flat or island, which probably once covered 
the whole of the area of the Ongea Lagoon. The bottom of the lagoon 
is made up of coral and coralline sand. Half a mile from the north- 
eastern horn of the outer reef of Ongea rises a sharp submarine peak, of 
which only the rock rising on the western edge remains, and on which 
has been formed the small circular reef of Thakau Teteika, about three 
quarters of a mile in diameter; while to the southeast, distant about 
three miles and a quarter, rises Nuku Songea, a triangularly shaped 
atoll enclosing a shallow lagoon with a low sand key at its northern 
extremity. 
Fulanga. 
Plates 22, 22%, Figs. 4, 5, and Plates S0-S4. 
Fulanga is an elliptical island deeply indented on its southwestern 
face (Plate 22), along which rises a ridge of elevated limestone to the 
height of 240 feet. This tertiary limestone rock has been elevated to a 
height of 260 feet at Quoin Hill, on the northeastern face of the island. 
The “ Sailing Directions” (p. 214) represent Fulanga as “ of voleanic and 
ENTRANCE TO FULANGA. 
coral formation, and the circular shape of the island leads to the suppo- 
sition that it is the rim of an extinct crater.” What I have seen of 
Fulanga shows no trace of voleanic rocks, though they may exist on the 
southwest shore, which we did not see. Mr. Gardiner,’ who visited 
Fulanga, classifies it among the limestone islands. It is quite natural 
1 Proc. Cambridge Phil. Soe., Vol. IX. Part VIII. p. 458 (1898). 
