EXAMPLES OF USE

The procedure was tested on late Pleistocene fragments of the ocean quahog Arctica islandica (Linné 1767) (class Bivalvia, family Arcticidae) (Figure 1 and Figure 2). The fragments were collected from a stone-rich shell conglomerate exposed along the Pyoza river (=Peza river) (locality 9801, geographic coordinates 65° 40' 40''N, 47° 32' 50''E, 49.75 meters above sea level, sample 98409), which is situated in Arkhangelsk Region, northern Russia (locality no. 25 of Devyatova and Loseva 1964). The procedure revealed several elongate borings oriented nearly perpendicular to the external shell surface. The procedure was also tested on a recent specimen of Phalium undulatum (Gmelin 1791) (class Gastropoda, family Cassidae), collected off Rhodes, Greece. In this specimen, complex networks, which consist of sinuous and rarely branching borings, occur in crossed lamellar shell structure (Figure 3 and Figure 4). Micrographs obtained by using a scanning electron microscope indicate potential use in studies of bioerosion in relation to microstructures. In the present case there appears to be no such relationship.