136 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
The evidence of elevation is not limited to that furnished by the re- 
mains of the elevated coralliferous limestone just mentioned, and it is 
natural to assume that the elevation we have just traced was but a 
part of a more general elevation, which perhaps took place in late tertiary 
times, and in which the whole group was involved. It is plain that there 
must have been most extensive denudation and submarine erosion going on 
throughout the group for a very considerable time, geologically speaking. 
The outlines of the islands, deeply furrowed by gorges and valleys, the 
sharp or serrated ridges separating the valleys, the fantastic outlines of 
the peaks and chains of Viti Levu, Vanua Levu, and Ovalau, all attest to 
the great work of atmospheric agency which must have been going on 
for so long a period. 
The extent of the separation of the islands, islets, or isolated rocks 
from the points or spurs of the larger islands also bears witness to the 
great length of time during which submarine erosion and denudation 
have been at work. 
The platforms of submarine erosion constitute the characteristic fea- 
tures of the islauds of Fiji. A glance at the sketch map of Fiji (Plate 1) 
and at the detailed charts of different portions of the group cannot fail 
to show how extensive this action has been. I need only call special 
attention to the northwestern extremity of Viti Levu, the eastern face of 
the same island (Plates 3, 7), the southern coast of Viti Levu (Plate 5), 
the southwestern and northeastern shores of Vanua Levu (Plates 3, 4, 
18), the extensive platform of Kandavu (Plate 11), that of the northern 
extremity of Taviuni, Budd Reef (Plates 4, 18), Thikombia (Plate 11), 
the platforms of submarine erosion of Mbengha (Plate 8), of Nairai, 
Ngau (Plates 12, 13, 14), of Makongai and Wakaya (Plate 15), of 
Moala and Totoya (Plates 16, 23), of the Exploring Isles (Plate 19), and 
of the smaller islands like Kimbombo and Kanathea (Plate 19), Lakemba 
and Oneata (Plate 21), Mothe, Komo, Yangas4, and Ongea (Plate 22), 
and a host of other smaller platforms. Finally, platforms of submarine 
erosion which have reached the stage of atolls of greater size, like the 
Argo Reefs (Plate 21), Reid (Plate 20) and Nanuku Reefs (Plate 18), 
Ngele Levu (Plate 17), or those-of smaller dimensions, like Adolphus 
Reef (Plate 18), Thakau Mata Thuthu, Thakau Vutho Vutho (Plate 
17), Duff (Plate 18), Dibble’s Reef (Plate 19), Motua Levu, Motua lai 
lai (Plate 18), Thakau Tambu (Plate 20), Thakau Lekaleka (Plate 21), 
Thakau Motu (Plate 22), Thakau Levu (Plate 22), and others. 
Add to this the fact that we are in a region of a former powerful and 
extensive volcanic activity, the traces of which can still be seen in all 
