. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. on Mud" environment on the leeward western side of the islands (Fig. 3). The bottom consists predominantly of hard, compact, rippled sand. Varying densities of the seagrasses Thalassia, Syhngodium, and Halodule occur with the algae Halimeda opuntia, Penicillus, Laurencia and branching Neogoniolithon strictum. Corals include Manicina areolata, Porites divaricata, Porites furcata, Pontes astreoides, Siderastrea radians, branching Cladocora arbuscula, and rare occurrences of Acropora cervicornis. Diadema are


. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. on Mud" environment on the leeward western side of the islands (Fig. 3). The bottom consists predominantly of hard, compact, rippled sand. Varying densities of the seagrasses Thalassia, Syhngodium, and Halodule occur with the algae Halimeda opuntia, Penicillus, Laurencia and branching Neogoniolithon strictum. Corals include Manicina areolata, Porites divaricata, Porites furcata, Pontes astreoides, Siderastrea radians, branching Cladocora arbuscula, and rare occurrences of Acropora cervicornis. Diadema are numerous as are Callianassid shrimp burrows. Other echinoids occur, as do Figure 4. "Mud bottom" depositional environment in north end of the channel separating the West and East Islands. Note scattered Halimeda and the upside-down jellyfish Cassiopeia xamachana (arrow).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]


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