Abstract
Complete tusks of the Naumann elephant, Palaeoloxodon naumanni (MAKIYAMA), have been collected from various localities in the Japanese Islands. Diameters of tusks measured at the intervals of every 10cm. from the tip are plotted on a graph refering to the distance from the tip (Figs. 1〜4). The graph shows two patterns in the mode of tusk tapering: gradually tapering type and abruptly tapering one. To elucidate factors relating to this tusk, dimorphism measurements of many more specimens are needed.
