14 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
mencing with the older, a series of rocks which, excepting the oldest, 
conform to the same dip and strike. They comprise a vast group of 
limestones and so-called ‘‘ Fiji soapstones ” that form the nearer coastal 
scarps, reaching in places to a height of 330 feet above the sea. The old- 
est of these Singatoka rocks is a compact bedded blue and apparently 
non-fossiliferous limestone having a high dip (50°) (Plate 3, Fig. 1). 
To this succeeds a series of soft rocks having an average dip of 15° 
(Plates 7, 33). The junction of this highly inclined blue lime- 
stone with the softer overlying strata could not be distinctly seen 
(Plate 32). The next group of strata in ascending order is undoubt- 
edly large and comprises a sandy species of limestone. This gives 
place to a shelly and foraminiferal zone ; another series contains fossils 
of Pecten and other lamellibranch types, with here and there a stray, 
weathered, indeterminable coral (Plate 3, Figs. 1, 2). Still another 
series comprises a dense, homogeneous, macroscopically non-fossiliferous 
zone, and this includes a six-foot belt of coral reef, containing Porites 
or Montipora. This, in turn, overlays a two-foot belt of red clay, and 
the top of the reef consists of a thin belt of finely laminated lime- 
stone. To this succeeds a great development in layers of a brown, 
friable rock that will scarcely bear the weight of the hammer (Plate 3, 
Figs. 1, 2). A gap in the section occurs at this spot, due to drift 
sands of later origin hiding the underlying rock ; but two or three miles 
toward Thuvu similar layers of fossiliferous limestone are again picked 
up, and in these occurs a belt of hard red limestone. 
At Thuvu the limestone has disappeared and its place is taken by 
hills 200 to 300 feet high of inclined “soapstone ” (Plate 4). 
The series of friable and dense limestones just considered lies back 
about two miles from the sea, the Singatoka having deposited its enor- 
mous flat seawards in front of it so that the cliffs abut directly on 
it. On the seaward of the lower limestone formations and of the old 
Singatoka flat a modern elevation has exposed a reef wall in places as 
much as twenty to twenty-five feet above high-water mark (Plate 5). 
This reef face is vertical. 
“Tap Lau Group” AND THE SMALLER Isuanps. 
These may be divided for purposes of classification, as has been done 
before, into: The volcanic islands ; The limestone islands ; The volcanic 
and limestone islands. 
1 See A. Agassiz, J. c., p. 17. 
