103. 4/5/38 28 blue Demigretta seen in tidal lagoon at south of island Lecking. 3/6/38 2 blue Demigretta seen, 1 shot on rock lahnimaha and in flight out to sea. 9/6/38 2 blue seen while at sea (within lagoon) on way to Beaupre Is. in small boat. 11/6/38 3 blue Demigretta. Beaupre Island. 13/6/38 8 blue Demigretta, at sea off and on island chain to N.W. of lagoon. 17/6/38 28 blue Demigretta on and about islands chain to N.W. of lagoon. From the above it will be seen that the species is common anwhere that surroundings are suitable, tidal lagoon and rocky places. The probable reason for species association with only rock areas on Uvea (and tidal lagoons) is that where rock areas occur these are more or less level ledges becoming dry at low tide and leaving rock pools etc. which have trapped small fish, or when covered with water offer a considerable area of more or less even depth of water. The same applies to tidal lagoon arms. Along the sand beach areas seas have thrown a more or less quickly sloping bank of sand to a point a foot or so below low tide level which makes too great a depth of water for Demigretta. From this point the lagoon floor slopes off very gradually at the angle or stability for sand under water. Something thus HIGH TIDE LEVEL LOW TIDE LEVEL LAGOON FLOOR 1 foot depth or more. DRY SAND BEACH