reef formation as shown in Roll 13 :3 Coral and pebble formation and reef looking E. by S. Sooty tern and two love birds on log at right. The flat is extremely xyrophytic, the beach runner and boerhaavia vine being absolutely prostrate on the cracked sandy and lump coral ground, and the bunch glass stunted and brown. Some little black pommace. On the lagoon side on a slightly elevated spot found as shown in Roll 13:4 Two peculiar built up platforms of flat coral slabs, 6' x 7'x 10' high and 7' x 10' and over 1 ft. high at N.E. corner, 10' or 12' elevation, thirty yards from lagoon and each with what was for- merly an upright slab in middle. They were parallel to lagoon beach. Numerous rat holes. Roll 13:5 Clump of Tournefortia trees and sickly looking kou, on a point of land running out into the lagoon. The leaves of the kpu tree were badly eaten by a mottled, orange tinted caterpillar (took several both in alcohol and breeding can). Also caught spiders, yellow flies, black flies, Syphus grandicorios and a large brown bug. The Tournefortia trees had about them the usual white red and black spotted moths, green muscid flies, white micro-lep, small black flies and about the boobie nests hippoboscid flies similar to but smaller than those on frigtes. Caught a lizard in a boobie nest. On the next point is a large patch of Tournefortia, about 150 feet in diameter and near it a very small patch of sickly looking Pemphis, about 1 1/2 - 2 feet high, used as nesting place by Frigate bird colony. Roll 13:6 Boat returning, and S.E. end of the lagoon, looking east. Back across lagoon to entrance. Noted a series of parallel reefs, extending across the lagoon from N. by W. to S. by E. forming an effective barrier at low tide to even a flat bottom boat. The lagoon is also thickly beset with coral heads. Therd are large open spaces, however, which would permit landing in a hydroplane, if care were taken in choosing the spot.