ngle.

[Illustration: 325]

[Illustration: 326]

Figure 327 is a tented arch, not because of the dot, however, as it
cannot be considered an upthrust. The tented arch is formed by the
angle made when the curving ridge above the dot abuts upon the ridge
immediately under and to the left of the dot.

[Illustration: 327]

[Illustration: 328]

Figure 328 consists of two separate looping ridge formations in
juxtaposition upon the same side of a common delta. This pattern
cannot be called a double loop as there is no second delta formation.
In order to locate the core, the two looping ridges should be treated
as one loop with two rods in the center. The core is thus placed on
the far rod (actually on the left shoulder of the far loop), resulting
in a ridge count of four (fig. 49).

[Illustration: 329]

[Illustration: 330]

Figure 329 is a loop of three counts. It cannot be classified as a
whorl as the only recurve is spoiled by the appendage abutting upon it
at the point of contact with the line of flow.

Figure 330 is a plain arch as there is no upthrust (an upthrust must
be an ending ridge), no backward looping turn, and no two ridges
abutting upon each other at a sufficient angle.

Figure 331 is a plain arch. The ending ridge at the center does not
rise at a sufficient angle to be considered an upthrust, and it does
not quite meet the ridge toward which it is flowing and therefore
forms no angle.

Figure 332 is a plain arch. There are two ending ridges, but no
separate delta formation is present.

[Illustration: 331]

[Illustration: 332]

[Illustration: 333]

[Illustration: 334]

Figure 333 is a plain arch. The rising ridge at the center is curved
at the top forming no angle, and does not constitute an upthrust
because it is not an ending ridge.

Figure 334 is a whorl of the double loop type. Two loops and two
deltas are present. It is unusual because the loops are juxtaposed
instead of one flowing over the other, and one delta is almost
directly over the other. The tracing is a meeting tracing.

Figure 335 is a tented arch. Although there is a looping ridge, no
ridge count can be obtained. The core is placed upon the end of the
ridge abutting upon the inside of the loop, and so the imaginary line
crosses no looping ridge, which is necessary.

Figure 336 is a plain arch. The ending ridge at the center cannot be
considered an upthrust because it does not deviate from the general
direction of fl