This giant of its tribe, from the great likeness it bears to the
alligator, has appropriately been called after the huge saurian. It has
a large head covered with a hard wrinkled skin, and a long thick neck,
over which are scattered a number of projecting tubercles. On the shell
of the adult animal there is a depression along the centre, which leaves
a sort of keel on each side of the central line.
The creature is exceedingly voracious, feeding on fish, reptiles, or any
animal substance. It generally inhabits stagnant pools or sluggish
streams, living mostly at the bottom. Occasionally, however, it rises
to the surface, and elevating the tip of its pointed snout above the
water, floats along with the current. Sometimes, indeed, it lands, and
makes its way to some distance from the river; but its motions are very
awkward, not a little resembling those of the alligator.
A considerable number are taken by strong hooks, and, as the flesh is
esteemed for food, are sold in the market.