it forms a bifurcation and not an abutment of two ridges at a
right angle, the recurve is considered as remaining intact. The test
is to trace the looping ridge toward the appendage, and if, when it is
reached, the tracing may be continued as readily upon the appendage as
upon the looping ridge, with no sudden, sharp change of direction, the
recurve is sufficient. Figures 161 to 184 should be studied with this
in mind.

[Illustration: 161. Tented arch.]

[Illustration: 162. Tented arch.]

[Illustration: 163. Tented arch.]

[Illustration: 164. Tented arch.]

[Illustration: 165. Tented arch.]

[Illustration: 166. Tented arch.]

[Illustration: 167. Tented arch.]

[Illustration: 168. Tented arch.]

[Illustration: 169. Loop.]

[Illustration: 170. Loop.]

[Illustration: 171. Loop.]

[Illustration: 172. Loop.]

[Illustration: 173. Loop.]

[Illustration: 174. Loop.]

[Illustration: 175. Loop.]

[Illustration: 176. Tented arch.]

[Illustration: 177. Tented arch.]

[Illustration: 178. Tented arch.]

[Illustration: 179. Loop.]

[Illustration: 180. Loop.]

[Illustration: 181. Loop.]

[Illustration: 182. Loop.]

[Illustration: 183. Loop.]

[Illustration: 184. Loop.]

Figures 185 to 190 show additional examples of tented arches.

[Illustration: 185]

[Illustration: 186]

[Illustration: 187]

[Illustration: 188]

[Illustration: 189]

[Illustration: 190]

The reason that figure 185 is given the classification of a tented
arch is because of the presence of all the loop requirements with the
exception of one, which is the recurve. In this pattern appear three
ending ridges. The lowest ending ridge provides the delta, and the
other two by the convention explained previously, provide the ridge
count. It is a tented arch, then, of the type approaching the loop,
with two of the characteristics, but lacking the third, a recurve.
Figures 186 and 187 are tented arches of the same type. A close
examination of these prints will reveal that when the imaginary line
is drawn between delta and core no ridge count across a looping ridge
can be obtained. It must be remembered that the core of a loop may not
be placed below the shoulder line. Lacking one of the three
characteristics of a loop, these patterns must be classified as tented
arches. When figure 188 is examined, it will be noticed that the
recurve is spoiled by the appendage abutting upon it between the
shoulders at a right angle, so it must als