August 7, 1964 (cont.) Plankton tows into one sample. of two hour duration, seven separate tows pooled Tows were from east of the island with the "M" boat drifting. “Invertebrates of the regular sampling series were scarce on Rigili as they have usually been. Holothuria leucospilota tophthalma (3), Dardanus Samples were taken of (3), Graspus graspus (?) and coral (Acropora and Fungia). Lacking in the sample were tridacnid clams, bita, and Birgus. (3), Ocypode cera- spider snails, Coeno-