p.1

P 1 p 372

Genus Manatus, Linneus.

Harlan, Fauna Am. p 275.

Incisors 2/0, canine 2/0, Molars 14/16, or
16/18, = 34 or 38. Incisors very
small, existing only in the foetus ; adults
have only 32 teeth, as four molars fall
in early life ; crowns of the molars
with two transverse tubercles, with
three points at their summits in the
young tooth ; superior teeth square,
inferior oblong; sixteen pairs of ribs
thick and solid, the two first only
articulating with the sternum.