south the length of the lagoon to Motu Katava. Description of Lagoon - Danger Islands. The three islands, Puka Puka, Katava and Koe - making up the Danger Is. are connected by broad reefs, which on the west and south are always awash. The atoll thus found is about 3 by 5 miles in extent, enclosing a triangular lagoon, narrow at the north and widening to about 3 miles E and W at the south. The north end of the lagoon, between the arms of Puka Puka, is shallow and filled with coral heads and reefs, which continue intermittently for about 1/2 mile, until south of opposite a sand cay being coconuts and pandanus. On the east a long arm of sand and coral crowns the reef for another 1/2 mile and intermittantly beyond. South of this cay and area of ooral heads is a stretch of nearly open water, fairly free from coral heads. The water is deep, up to 8 or 10 fathoms. One or two coral heads rise to near the surface within this area. The south end of the lagoon, near the two southern islands, is again blocked by coral heads and reefs. Rough Sketch of PUKA PUKA The island is a little less than one mile across. Dash line represents edge of reef. Dots represent sand or broken coral. Trails run everywhere, only the main path across the culvert connecting village is shown.