The Leg Spinner
The grip is two fingers up and two down, with the split between the second and third fingers,
which are spread across the seam. The thumb rests on the ball and does not do anything.
The delivery - The spin on the ball is roughly 30 degrees so that the ball both spins sideways and dips with the overspin. Closest variation is the top-spinner, where the seam points to the wicketkeeper and the ball over-spins straight down the pitch.