The middle finger and the mound just below it are ruled by Saturn.
Astrologically Saturn is the ruler of the zodiac sign Capricorn. It is at home in the 10th house of the wheel. Saturn's element is Earth.
Mythology
Saturn was originally an agricultural god and was concerned with sowing of seeds. The Greeks called him "Sun of the night" and he was associated with the passage of time, old age and death. Saturn's temple was used as a depository for the state treasury and archives.
During the feast of Saturnalia, all business was suspended and the roles of master and slave would be reversed for seven days.
Astrological Meaning
Saturn is the planet of contraction, limitation and time. It rules form, structure, focus, discipline, responsibility, steadfastness, security or insecurity, modesty, harvest, bitterness, depression, success or lack of it, and rigidity. Saturn is the patron of hermits, monks, judges, critics, farmers, mentors, the ancestors and the elderly, lawmakers and builders.
Saturn in your Hand
In the hand the areas of Saturn measure completion, accountability and self-worth. It is here where the palmist looks for the subjects attitude towards responsibility and to see if he or she is doing what they are supposed to. Keywords include integrity, security, discipline, should, prudence, prudishness, duty, obligation, money, values, resources, environmentalism, pessimism, conformity and structure.
Because of the emphasis on security, employment and success in our culture the Saturn finger tends to carry its share of baggage and it is not uncommon for the finger to be twisted, overgrown or challenged in some other way.