In Manatus most of the bones of the carpus are distinct, but in Halicore many, especially those of the distal row, have coalesced.
Between the two rows there is a centrale as in the carpus, or there may be two.
The foot is short, and the bones of the carpus are serially arranged.
The carpus consists of six small bones arranged in two rows.
It articulates at its proximal end with the humerus, and at its distal end with the radiale or scaphoid bone of the carpus.
The carpus often has two centralia and the intermedium is absent.
The reduction of the toes in fact implies a reduction of the separate elements of the carpus.
This, like the carpus, is much reduced and modified from the primitive condition.
The largest Cretaceous examples are about two inches wide where they join the carpus.
In Echidna the carpus is broad, the scaphoid and lunar are united and there is no centrale.
carpus car·pus (kär'pəs)
n. pl. car·pi (-pī')
The group of eight carpal bones and associated soft parts forming the joint between the forearm and the hand, articulating with the radius and indirectly with the ulna, and with the five metacarpal bones. Also called wrist.
The carpal bones considered as a group.