Dr. Éva Murai szerk.: Miscellanea Zoologica Hungarica 1. 1982 (Budapest, 1982)

Domokos, T.: Morphometrial study of the chronocline of Granaria frumentum (Draparnaud, 1801) (Gastropoda: Chondrinidae)

erosion and damage of shells. Since the thickness of the shell walls varied between 0.05-0.07 mm, it would have been worthwhile to take the measurements with higher precision. I measured in mm, the height (H) and width (W) of the shells and calculated the following index and statistics: H/W (elongation), A (range of measuring), Me (median), Mo (modus), (3 (standard deviation). Fig. 1. Histograms constructed from height data (H) of Granaria frumentum from different localities - a = Kocsola (recent ) {a.\ values by photographic method; a2 values direct measurement); b = Süttő (R/W, 9. layer); c = Szabadhidvég (Lower Pleistocene, V) (cj = 7. layer, C2 = 3. layer, C3 = 2. layer)