islands for the balance of September and October. Off Yaroua at 9:30. Ran along east side and around north end looking for suitable landing place. Landing would be possible at high tide on the N. W. point, but the tide being low and the wind from the N. W., we did not stop. Yaroua is about 500 yards north and south and 300 east and west. It is surrounded by a broad, steeply sloping sand beach. The interior is thickly covered with coconut palms and beach trees, the total height being about 70 feet. It is smoothly ovate in outline, surrounded by a fringing reef which lies from 200 to 400 yards off shore. This makes its total length about 3/4 mile and width of about 1/2 mile. On the N. W. point are a few native houses which were occupied; a few natives being seen on the beach and nearby. No canoes on the beach. Continued our course to Katafanga. We entered the lagoon not by the break in the reef indicated on the chart (No. 2852) as being the entrance for small craft, but by the next break west which is directly north of the N. E. point of the island, as indicated on my sketch. Anchored off S. E. point at 12:30 P.M. The island is partly volcanic and partly of elevated limestone. The southern 2/3 is of volcanic origin, thickly covered with coconut palms, be- neath which is grass, weeds, and scattered scrub (very little of the latter). In this portion there are two rounded hills each about 180 feet high. Just north of the summit of the second hill a transition area begins in which the smooth grassy slopes has limestone boulders of various sizes up to 25 or 30 feet in diameter scattered through it. The larger of these support a stand of low- land trees. To the north stretches a section of typical limestone "badlands" with dense forest and scattered patches of coconut palms. A sand beach, under- lain or surplanted by slab sandstone on the east, surrounds the volcanic por- tion while the northern beach is rough limestone undercut ledge.