The ulna is curved and rather stout; it articulates with both carpal bones; the cubital quills often cause rugosities on its dorsal surface.
This, the stretcher of the cubital quills, is a very interesting muscle.
Arising as a long tendon from the sterno-scapular ligament, it passes the axilla by means of a fibrous pulley, accompanies the axillary vessels and nerves along the humerus, and is inserted by a few fleshy fibres on the base of the last two or three cubital quills.
Quinto-cubital, toes normal.
There are several curved median and cubital nervures and a single anal, but few cross nervures or areolets.
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