File:Elephant molars.jpg

Translation (partly): "Fig. 87. Penultimate, lower molar of an asian elephant, Elephas asiaticus, as seen from above; 1/4 natural size Fig. 88 Penultimate, lower molar of an african elephant, Elephas africanus, as ssen from above; 1/4 natural size Fig. 89. Penultimate, lower molar of an Mastodon ginganteum, as seen from above; 1/4 natural size"

Size: 3.1 x 2.3 in² (7.8 x 5.8 cm²)

Originator: Hubert Ludwig

Source: Schul-Naturgeschichte 1891

Wikimedia Commons http://commons.wikimedia.org/wiki/Image:Elefantenzaehne-drawing.jpg