66 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
width off the northern extremity of the island. Off the southwest face 
of the island there is a shallow incipient lagoon. There is a large crack 
running through the peak of the highest point of the island near the 
southern point, as if the sea face might scale off at any moment and form 
a vertical cliff. There isa fine vertical cliff along the northeast point of 
the island over 100 feet in height, deeply undercut. From the lower 
edge of this cliff numberless negro-heads extend over the surface of 
the fringing reef flat, which is covered by large patches of flourishing 
corals. 
NORTH POINT OF MARAMBO. 
Dana and Darwin both speak of fissures passing through the shore 
shelf reef. The fissure we saw at Marambo I attribute to the giving 
way of the shore bluffs from the undermining preparatory to its shal- 
ing off. 
W angava. 
Plate 22. 
Wangava, as seen from the passage between it and the northern ex- 
tremity of Kambara, appears to be composed of two parallel ridges of 
limestone, elevated to a height of nearly 300 feet. The island is steep to 
on all sides, steep cliffs forming its eastern and western faces. It is 
surrounded by a wide fringing reef (Plate 22) except off the north face, 
where it becomes broken up into coral heads and patches. 
Vatu Leile. 
Plates 9, 17°, Figs. 1-4, and Plates 100-102. 
Vatu Leile, the westernmost island of the group we examined, is tri- 
angular in shape, with a small lagoon extending along the eastern and 
the northern faces of the island (Plate 9). The lagoon is comparatively 
shallow, not having anywhere a depth greater than five fathoms. Nearly 
