The loop is the most common fingerprint pattern all over the world. To identify the three patterns, note the 'delta', the point where lines from three directions come together. The whorl has two deltas, the loop has one (see bottom-left), and the arch has no delta at all.
The ulna is on the same side as the little finger and the flow of the pattern in a ulnar loop runs in the direction of the ulna (toward the little finger). Radial Loop Ulnar Loop. Whorls are seen in about 25-35 % of fingerprint patterns encountered.