. ae 
Peper: 
AGASSIZ: FIJI ISLANDS AND CORAL REEFS. 17 
and north again as far as Asawa i lau, both of which islands, as I am 
informed by Dr. Corney, consist of elevated limestone (Plate 2). Viwa 
is 100 feet in height.? 
Plateau off Nandi and Yasawa. 
To the westward of Nandi waters (Plate 3), off the northwest coast 
of Viti Levu, extends a wide plateau, the result of the denudation and 
submarine erosion of that side of the island. The depth of this plateau 
is most irregular, varying from ten to forty fathoms. The plateau is 
studded with sunken patches, and with rocks and islets and islands. The 
southwestern line of islands from the Mololo Islands to Mana is flanked 
by an outer line of reef flats, which gradually become smaller and disap- 
pear off Tartar Reef (Plate 3). From these the edge of the plateau 
crosses toward the north, and the outer reefs reappear again to the 
westward of the long chain of the Yasawa group. 
The Viwa Island reef is separated by a narrow, deep channel, with 
137 fathoms in mid-channel, from the western edge of the Yasawa 
platean. To the northward of the Malolo Islands are scattered a few 
islands, — Kandavu, Lovuka, Tavua,and Vomo. The last is of volcanic 
VOMO LAI LAI. 
origin, while Kandavu is flanked by beach rock, as is also Tavarua at the 
entrance of Navula Passage. All the islands which Captain Thomson 
examined on his way from the Malolo Islands to Waia he found to 
be of volcanic origin,— Mana, Tavua, Monu, and others. As I have 
1 The elevated limestone patches which begin at Singatoka extend to the patches 
and reef flats north of Navula Passage (Plates 2, 3). Captain Thomson collected 
some pieces of a negro-head on the edge of the reef flat near Tavarua Island 
which consisted of elevated limestone. 
