In this paper, a continuation of ten previous papers, 14 taxa belonging to the genera Campylodiscus, Cymatopleura, Surirella and 10 taxa belonging to the formerly reported genera 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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窒素沈着によって引き起こされる森林の酸性化および窒素飽和現象についての研究は重要である．本研究では，窒素飽和が報告されている多摩丘陵や鎌倉と山間部の奥秩父において，スギの樹冠で無機態窒素(DIN; [NO₃ -N]+[NH₄ -N])および有機態窒素(DON)の量的寄与を明らかにすることを目的とした．スギ樹冠通過雨では，多摩丘陵ではDINが27.6 kg N ha^-1 yr^-1，DONが4.6となり，鎌倉ではDINが42.9 kg N ha^-1 yr^-1，DONが4.3と無機態窒素が全窒素の約9割を占めた．一方，奥秩父ではDINが7.5 kg N ha^-1 yr^-1，DONが2.9であり，溶存有機態窒素の占める割合が高く28%であった．DINは都市近郊と山間部では大きな違いが見られ，都市近郊では乾性沈着の影響によってDINが増大していると推測された．一方，DONでは調査地毎で違いがなく，樹齢によってわずかに増大している傾向があった．

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The Kurosegawa River, a polluted small river, flows through Higashi-Hiroshima, Hiroshima, where the population has increased steadily within the last decade. In order to clarify the impact of urbanization on the quality of the river water, changes in the state of organic pollution were studied in relation to population, construction of sewers and septic tanks in a recent 13-year period (1989-2001). Improvement in water quality (as indicated by BOD) was observed in the central area of the city, possibly as a result of the construction of sewers and septic tanks. In contrast, the BOD tended to increase in the lower reaches of the river. The pollutant flow analysis indicated that inflow of pollutant from a sewage treatment plant contributed to a significant proportion of the load. A simulation suggested that, with increasing population and sewage water, the BOD in the lower reaches of the river would be higher in the future because of the increase in the load from the plant. Based on the pollutant flow analysis, some solutions for reducing organic pollution are suggested.

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Eucladium verticillatum (Brid.) Bruch & Schimp. and Gymnostomiella longinervis Broth., designated as critically endangered or endangered species. were found in Sakae, Yokohama, Kanagawa. Eucladium verticiltatum had been found in the marine caves at the Miura Peninsula, Kanagawa, where Zushi stratum of Miura stratum group lies. This time, E. verticillatum was found on a wet cliff of Nozima stratum of Kazusa stratum group. Gymnostomiella longinervis was found on a separate dry cliff of the same stratum, which was the first report from Kanagawa.

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Pollen analysis was conducted at the Maebashi peat bed, late Pleistocene, Takasaki, Gunma. Paleovegetation of approximately 13 to 21 Ka was reproduced and local pollen zones were determined. The paleo vegetation of this age was primarily comprised of conifer trees of the subarctic to temperature zone mixed with deciduous broard-leaved trees. The combined occurrence of Fagus and Quercus, which are major deciduous broad-leaved trees of the cool temperature zone, was subject to changes consistent with the paleoclimate change curve.

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Structural and compositional succession patterns of plant communities from bare ground were studied on three soil types, i.e. sandy, loamy, and Ando soils. In addition, the ecological status of naturalized plants was examined in relation to both succession and soil conditions. Differences in structure and composition of plant communities among soil types were small in the earliest (1st year) stage. However, they became larger with advancing succession. Naturalized plants mostly dominated in the succession stages on sandy soil. In the following (2-4th year) stages of succession, naturalized plants were dominant on all soil types; however, they were replaced by native plants in the later stages. The results suggested that naturalized plants were overwhelming in the stages where indigenous plants were still vulnerable, particularly on open and sandy soil that resembles their hometown habitats. Therefore, the establishment of native plants seems to be delayed in the succession.

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エゴヒゲナガゾウムシの活動の日周期性を明らかにするために，赤外線のビームの遮断回数を記録できるアクトグラフを用いて，雌雄それぞれ２個体の活動を４日間にわたり記録した．その結果，本種は明瞭な昼行性の活動パターンを示した．本種のオスの眼柄は著しく突出しており，オス同士が顔を突き合わせて闘争行動を示すことが知られている．昼行性であることは，こうした闘争において，視覚が重要な行動の刺激になっていることを示唆している．

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Campylopus gemmiparus Z. lwats. et al. (newly described in Japan in 2002) was found in Kanagawa. Illustrations and full descriptions including newly found perichaetial leaves of 10 samples found from four localities are presented.

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146 species of moss, 56 species of liverwort, and one species of hornwort were recorded from approximately 850 specimens collected from Mt. Shoutousan and adjacent area, lying north of Lake Sagami, Kanagawa Prefecture. Taxa of phytogeographic interest included Fissidens geppii, Campylopus gemmiparus, Orthotrichum erubescens, O. exiguum, and Plagiochila yokogurensis.

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Suzaki, Shimoda is a small coastal area, approximately 3 km X 2.5 km, which is located in the southeastern part of Izu Peninsula, Shizuoka. The natural environment of this area is preserved in good conditions; the vegetation is characterized by dense natural forests of evergreen broad-leaved trees and coastal plant communities along a rocky sea shore, which is a part of the national park. Naturalized plants of Suzaki are compared from two viewpoints. One is a chronological viewpoint; the present distribution of naturalized plants is compared with that in 1980. The other is a geographical one; the naturalized plants of Suzaki are compared with those in Tama, which is a highly urbanized city in the metropolitan Tokyo area.
Based on our field work, 104 naturalized species belonging to 33 families are recorded. This number is double of that in 1980 and approximately one third of Tama.

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日本の６ヶ所の沿岸域における母植物と表層堆積物中の植物珪酸体分布の比較から，代表的な海岸植物の植物珪酸体を中心にその運搬状況を検討した．ヨシ型は，植物珪酸体分布を堆積物中出現率で算出しても母植物生育域において高率で，運搬され難いことが確認された．

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Six species of the genera Bovista and Lycoperdon (Lycoperdaceae) deposited in the herbarium of Hiratsuka City Museum, Japan are reported: Bovista aspera, B. dermoxantha, Lycoperdon caudatum, L. lividum, L. perlatum, and L. umbrinoides. Among these species, B. aspera is newly recorded from Japan.

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Flower visiting by butterflies for nectar feeding was studied quantitatively using the transect-counts method at a newly created riparian biotope located in Sakado, Saitama, central Japan. During the study period (May-November, 2003), 590 flower visits by 20 butterfly species were recorded. Although only 12 (34.3 %) of 35 nectar source plants were exotic plants, they received 74.2 % of the total flower visits. Dependency on exotics (the proportion of exotics to the total number of flower visits) varied seasonally and correlated negatively with the diversity of nectar sources which was determined by the Shannon-Weaner function. This trend implies that a few exotics are seasonally dominant (Erigeron annuus and E. philadelphicus in May-July, and Bidens pilosa and Solidago allissima in October-November). The comparison of the results of this study with those of a similar study conducted at Mt. Fuji, Japan, I suggest the possible use of the transect-counts of butterflies feeding nectar as a convenient method to quantify the prevalence of exotic plants.

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A photographic report is presented on the morphologic and behavioral characteristics of the Common scops owl (Otus scops).

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