. Boletim da Sociedade Portuguesa de Ciias Naturais. Natural history; Biology. Bulletin de la Société Portugaise des Sciences Naturelles Vol. II Planche II. Gisement de Diatomées fossiles du Salto do Bargado (Fumas) F. A. CHAVES phot. T. BORDALLO grav,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sociedade Portuguesa de Ciias Naturais. Lisboa, Sociedade Portuguesa de Ciias Naturais

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