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Only 4 species of centipedes were previously reported for Lithuania. Here we present current distributional data for a total of 20 species (12 species of Lithobiomorpha and 8 species of Geophilomorpha) collected mainly during 7 years conducting ecological research at Curonian Spit, drawing on samples from the central, eastern and north-western parts of Lithuania.

Mineralogical and petrological studies of forty-eight mica concentrates and of their host rocks were carried out in order to establish the relationship between the chemical composition of fresh micas and the following physical properties: optical and X-ray diffraction properties, specific gravity and specific magnetic susceptibility, and stability on heating. This relationship is illustrated in fifteen working curves. The chemical composition of mica is related to the type of host rock, sequence of crystallization, and associated minerals. A special emphasis is placed on rocks containing more than one generation of micas.

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