Statistical analysis indicates that Papyridea (Fulvia) nipponica Yokoyama, 1924, Papyridea matschigarica Khomenko, 1938, and Papyridea matschigarica uspenica Barinov in Gladenkov et al., 1987, are synonyms of Papyridea harrimani Dall, 1904, which was originally described from the lower Oligocene Stepovak Formation in Popof Island, Shumagin Islands, southwestern Alaska. Papyridea harrimani occurs only in late Eocene and early Oligocene faunas and is useful for correlating strata from northern Honshu to Alaska : Stepovak Formation, southwestern Alaska; Mallenskaya and lonayskaya Suites, Koryak Upland; Aluginskaya Suite and lower part of the Pakhachinskaya Suite, eastern Kamchatka; Amaninskaya, Utkholokskaya and Viventekskaya Suites of western Kamchatka; Machigarskaya, Arakayskaya, Gastellovskaya and Akhsnayskaya Suites, Sakhalin; Nuibetsu, Charo and lower Sankebetsu Formations, Hokkaido; Asagai Formation, Honshu. In views of the stratigraphic ranges of Papyridea harrimani and other molluscs, strata 3 and 4 of the Pakhachinskaya Suite in eastern Kamchatka may be assgined an age of early Oligocene.

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The eastern Klamath terrane (eKt) of California, a geographically isolated, island-arc area, was invaded by biostromal communities during three intervals of carbonate deposition in the Carboniferous and Permian. Visean/Serpukhovian biostromes were formed on short-lived carbonate banks by the Tethyan brachiopod Striatifera and phylloid algae. Bashkirian biostromes on similar banks were formed by the cosmopolitan microproblematica Tubiphytes and Donezella. Wolfcampian biostromes occur in a thick carbonate platform and slope section and were formed by Tubiphytes, the phylloid alga Eugonophyllum, and Palaeoaplysina, an enigmatic taxon known mainly from Laurentia. Species diversity of biostrome dwellers increased from the Early Carboniferous to Early Permian, when it reached the level of high-diversity shelf-mud communities. Biostromes in the eKt record the global recovery of Carboniferous-Permian reef biotas during temporal intervals of quiescent volcanism that permitted carbonate deposition.

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The following five taxa of the genus Mariella of the Turrilitidae from the Upper Albian and Lower Cenomanian of Hokkaido are described : (1) M.(Mariella) bergeri (Brongniart, 1822), (2) M.(M.) aff. bergeri (Brongniart), (3) M.(M.) miliaris (Pictet and Campiche, 1861), (4) M.(M.) cf. carrancoi (Bose, 1923) and (5) M.(M.) gallienii (Boule, Lemoine and Thevenin, 1907). The present study gives new or revised information as to the taxonomy and stratigraphic occurrences of these species.

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A Cenomanian and Turonian (Late Cretaceous) sequence along the Shirakin River, Oyubari area, central Hokkaido, Japan contains seven datum planes of planktonic foraminifera that can be used to establish international correlations. These datum planes are marked by the first appearance of Praeglobotruncana gibba, Rotalipora greenhornensis, Rotalipora deeckei, Marginotruncana schneegansi and Marginotruncana pseudolinneiana, and the last appearance of Rotalipora deeckei and Rotalipora cushmani. These datum planes can be correlated with international Cretaceous planktonic foraminiferal zones in the interval KS17-KS22. Seventeen planktonic foraminiferal species are described including five new species : Hedbergella kyphoma, Praeglobotruncana compressa, Praeglobotruncana inermis, Praeglobotruncana shirakinensis, and Dicarinella takayanagii.

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Continuous growth sequences are recorded in vertical (=median longitudinal) sections of the columella of the fossil potamidid gastropod Vicarya yokoyamai Takeyama, from subtropical Miocene faunas of Japan. Shells from the Mizunami, Uchiura, Bihoku, and Masuda groups show semidiurnal tidal growth patterns. This suggests that V. yokoyamai lived in the intertidal zone. Growth curves were reconstructed on the basis of numbers of tidal growth lines. These growth curves were found to be very similar with one another, and indicated that shell-height increased from 1.5cm to 8cm in two years.

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A cephalopod fauna consisting of 11 species belonging to 7 genera is described from the Lower Ordovician Maggol Formation near Taebaeg City in South Korea. The fauna includes two new species, Ormoceras weoni and Michelinoceras cancellatum, and Wutinoceras, a primitive genus of the family Actinoceratidae first reported from South Korea. Ormoceras cricki from the Middle Ordovician Duwibong Formation occurs in the uppermost horizon of the Maggol Formation, and thus may be regarded as a forerunner of the ormocerids in Korea. The Maggolian cephalopod fauna comprising Wutinoceras robustum, Kogenoceras nanpiaoense, and Manchuroceras spp. shows closest affinities with those from the Setul Limestone of the Langkawi Islands, Malaysia and from the Beianzhuang Formation of Hwangho Basin, North China. This fauna is, therefore, assigned in age to the late lbexian to early Whiterockian in the American Early Ordovician scale.

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