structural differences found in the manus of fur seals and sea lions include : ( 1 ) reduction in size of the ulnar side of the carpus and a radial shift in the length-order of the digits , ( 2 ) development of musculature in the antebrachial fascia which attaches to the caudal margin of the flipper , ( 3 ) orientation of the radial side of the manus dorsal and radial to the rest of the hand , ( 4 ) increased range of possible midcarpal movement and in deviational mobility at the first and fifth digits , ( 5 ) attachment of forearm musculature onto radial digits and ( 6 ) well-developed hypothenar muscles and absence of thenar muscles .
C0018563
hand
C0230403
fifth