Page:Natural History (1848).djvu/138

128 such habits, the weight of the tusks sustained in water would have been no source of inconvenience; and if we suppose them to have been employed as instruments for raking and grubbing up by the roots large aquatic vegetables from the bottom, they would under such service, combine

SUPPOSED FORM OF DINOTHERIUM.

the mechanical powers of the pick-axe with those of the horse-harrow of modern husbandry. The weight of the head, placed above these downward tusks, would add to their efficiency for the service here supposed, as the power of the harrow is increased by loading it with weights. The tusks