The dugong is closeley related to the manatee. It has no hind limbs, but its forelimbs are converted…
"The Dugong is an herbivorous mammal, belonging to the Manatees. It ranges from 10 to 20 feet in length.…
The Dugong (Dugong dugon) is a large marine mammal in the order Sirenia with the manatee.
"Skeleton of Dugong: In which the pelvis is a mere bony ring." — Chambers, 1881