Stream waters with forested catchments were investigated for Cl^- , SiO₂-Si, and NO₃ concentrations in the Chichibu-Tama-Kai mountainous region with an altitude range of 220-2,200 m. Cl^- concentration was higher detected at lower altitudes and decreased as altitude increased. Similarly, SiO₂-Si concentration decreased as altitude increased. However, the concentration slope of Cl^- was more pronounced. Here, atmospheric deposition following transportation was considered to be influential. NO₃ concentration showed a strong altitude dependency and was particularly high in the suburban area, which possibly resulted from nitrogen deposition. Presumably, there were multiple factors dependent on transportation and temperature. On the other hand, comparatively higher NO₃ concentration was occasionally at high altitudes.

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In this paper, a continuation of nine previous papers, 20 taxa belonging to the genera Bacillaria, Cymbellonitzshia, Denticula, Hantzschia and Nitzschia are reported with light and scanning electron microscope photographs. Some comments are made mostly on the taxonomy and morphology of each taxon.

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93 species were recorded from approximately 350 specimens collected from the Morito-gawa (river) at the baseof the Miura-peninsula of Kanagawa. Taxa of phytogeographic interest include Epipterygium tozeri, Plagiomnium succulentum, and Vesicularia ferriei.

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Two dead seabirds, a red-necked grebe, Podiceps grisegena and a black scoter, Melanitta nigra (both mature males), stranded on Kujukuri-beach, Chiba Prefecture, central Japan in March 2003. Their stomach contents were examined. 10 resin pellets and a small amout of feather were found in the stomach of a red-necked grebe. Pinnotheres pholodis (Brachyura) and unknown Bivalvia were found in the stomach of the black seater.

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A comprehensive list of mosses of Yamagata-ken, northern Japan that appear in the literature was compiled. A total of 371 species, 4 subspecies, 20 varieties of mosses belonging to l47 genera and 47 families were found.

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