BULLETIN OF THE SOUTHERN CALIFORNIA ACADEMY OF SCIENCES Vol.67 October-December, 1968 No. 4 BRYOZOAN FOULING ORGANISMS FROM OAHU, HAWAII WITH A NEW SPECIES OF WATERSIPORA Dorothy F. Soule^ and John D. Soule^ Introduction During the course of an extensive study of the bryozoans of the Ha-waiian Islands, particular note was made of a relatively few species which generally constitute the bryozoans in the fouling communities in many locations there. On the island of Oahu, the authors made collec-tions at Kaneohe Bay from fixed and floating docks, from rafts, from suspended metal test panels, and from glass slides which were mounted in screened racks and hung at various depths. Boat hulls were scraped there and also at Ala Wai Yacht Harbor, where collecting was done as the boats were being raised for drydocking at Ala Wai Marine, Ltd. To the above information has been added data on the fouling species identified by the authors from the University of Hawaii collections and from the Bernice P. Bishop Museum collections. Much of the material from these latter sources lacks accurate collecting data, however. Members of the bryozoan phyla (Entoprocta and Ectoprocta) are among the most common fouling organisms, particularly during the warmer months of the year. Throughout the world some 1 50 species are known which foul ships' hulls, buoys, floats and test panels (Hutchins, 1952). At times the bryozoans may constitute nearly 100 percent of the fouling organisms on a given surface. On Oahu, thirteen species were found repeatedly, though in varying quantities, on harbor installations and boats. One frequently collected form, which at first was included in Watersipora cucullata (Busk), has been designated a separate new species Watersipora edmondsoni ^Research Associate, Allan Hancock Foundation, University of Southern Cali-fornia, Los Angeles, California, and Moore Laboratory of Zoology, Occidental College, Los Angeles. ^Research Associate, Allan Hancock Foundation, University of Southern Cali-fornia, Los Angeles, California, and American Museum of Natural History, New York, New York. 203
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