Pacific Science Volume 23, Number 1, 1969

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Pacific Science is a quarterly publication devoted to the biological and physical sciences of the Pacific Region.

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    Notes. On the Existence of a Coral Reef Regenerative Sediment
    (University of Hawai'i Press, 1969-01) Di Salvo, Louis H.
    Calcareous Detrial Sediment has been recovered from the interiors of semiconsolidated ramose non-living coral formations of several coral reef areas. While collecting invertebrates from Indian Ocean coral reefs during participation in the International Indian Ocean Expedition (1963), I was impressed by the general presence of a muddy sediment which was released into the water when the dead coral substratum was broken up. The presence of such a sediment seemed unusual in view of the normal clarity of the typically unproductive reef waters and the absence of land-derived sediments. At that time I began hypothesizing about the sediment dynamics and decomposer function in coral reef microenvironments.
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    Notes. The Nomenclatural and Taxonomic Status of the Hawaiian Shrub Scaevola gaudichaudii H. & A.
    (University of Hawai'i Press, 1969-01) Gillett, George W.
    In his treatment of the genus Scaevola in Hawaii, Skottsberg (1927) assigned the name Scaevola menziesiana Chamisso to a species that occurs on the six major Hawaiian islands, but which he apparently had not seen in nature. He cited many specimens from earlier collectors but none of his own. In reference to flower color he commented: "The corolla is said to be yellow. Fresh material of this interesting form is very desirable."
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    Notes. Aggregating in the Echinoid Evechinus chloroticus
    (University of Hawai'i Press, 1969-01) Dix, Trevor G.
    Evechinus chlorolicus, a large regular urchin endemic to New Zealand, shows marked clumping within populations, observable throughout the year in the field (Fig. 1) and also demonstrated by quadrat sampling (variance ratio test for 60, m2 samples along a transect gave P<0.005).
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    Aluminous-Ferruginous Oxide Mineral Nodules in Tropical Soils
    (University of Hawai'i Press, 1969-01) Sherman, G.D. ; Ikawa, Haruyoshi ; Matsusaka, Toshito
    Secondary oxide mineral nodules occur in the ferruginous, ferruginous bauxitic, and bauxitic soils of the Hawaiian Islands. The concentration of these oxide nodule aggregates which are larger than 2 mm ranges from 5 per cent in some ferruginous soils to as high as 85 per cent in the ferruginous bauxitic soils of the Halii family. The nodules are formed by the process of induration in which the hydrated amorphous hydroxide and oxides are dehydrated to their crystalline oxide form. The resulting indurated oxide nodule becomes an independent unit in the soil system with corresponding loss of effective surface even though the nodule may contain friable clay material in its interior. The typical nodule produced in the ferruginous bauxitic soil has a dense iron oxide layer (hematite and maghemite) and, in the interior, soft to hard, lighter-colored material which contains gibbsite.
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    Revision of the Genus Pandanus Stickman, Part 33 Further Accounts of Australian Species, and a Key to the Section Microstigma
    (University of Hawai'i Press, 1969-01) St. John, Harold
    Species of Pandanus were discovered in eastern and northern Australia at the beginning of the nineteenth century. Subsequent collections have revealed that the genus extends from the northern part of Western Australia, across the Northern Territory, over much of Queensland, and along the east coast down into New South Wales. Including the ones here described, there are 65 known species of Pandanus in Australia
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