Trithas On Hand:-
According to the Samudhrik Shastra there are four trithas in the palm as used in Tarpan. They are Pitri Tirth, Dev Tirth, Kaya Tirth and Bhrama Tirth. The pitri tirath is located on the space between the base of the index finger and the thumb. (http://indianpalmreading.blogspot.com) The dev tirth is represented by the tips of the four fingers, the kaya tirth is at the base of the little finger over which the line of marriage proceeds from teh ulnar border of the palm. The brahma tirth is at the ball fo the thumb, meaning the Mount of Venus.
This Mount is called the sukra which is the root of this creation that is Man.