obtained.

[Illustration: 67]

Figure 67 shows a ridge which enters on one side of the impression
and, after flowing toward the center, turns or loops on itself and
terminates on the same side from whence it entered. This pattern would
be classified as a loop. This pattern should be distinguished from the
pattern appearing in figure 139. Careful study of the pattern in
figure 67 reveals that the core is located at C and the delta D. The
imaginary line between these points will be crossed by the ridge
forming a loop. In figure 139, the core is located on the recurve and
an imaginary line between the delta and the core does not cross a
looping ridge. Figure 139 is thus classified as a tented arch, as will
be seen later.

Figure 68 shows at the center of the print a ridge which forms a
pocket. It will be noticed that ridge A does not begin on the edge of
the print, but this is of no significance. The ridge A within the
pattern area recurves or loops, passing the imaginary line between the
delta and the core, and tends to terminate toward the same side of the
impression from whence it entered. This is a loop pattern possessing
all of the requirements.

In figures 69 and 70, it will be observed that there is a ridge
entering on one side of the pattern which recurves and then turns back
on itself. These patterns are different from any others which have
been shown in this respect but are classified as loops. In each of the
patterns the core and delta are marked "C" and "D". The reader should
trace the type lines in order to ascertain why the delta is located at
point D, and then apply the delta rule.

[Illustration: 68]

[Illustration: 69]

Figure 71 is an example of loops as they appear on the rolled
impression portion of a fingerprint card.

[Illustration: 70]

[Illustration: 71]

Right Hand
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1. Thumb | 2. Index | 3. Middle | 4. Ring | 5. Little
| finger | finger | finger | finger
[Illustration]|[Illustration]|[Illustration]|[Illustration]|[Illustration]
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Left Hand
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6. Thumb | 7. Index | 8. Middle | 9. Ring | 10. Little
| finger | finger | finger | finger
[Illustration]|[Illustrat