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The most striking example of this occurrence is the cystoid softening of cartilage, especially of the costal cartilages of old people, the basis substance being transformed into a fluid containing mucin.

Cyst′ic, Cyst′iform, Cystoid′, having the form of, or contained in, a cyst or bag.—ns.

In all likelihood many cases of relief or cure following iridectomy are those due to the formation of cystoid scars or minute fistulae, rather than as a result of the removal of a portion of the iris periphery.

The CRINOID, named from its resemblance to the lily, is like the cystoid in many respects, but has a longer stem and supports a crown of plumose arms.

The cystoid reaches its climax, but there appear now two higher types of echinoderms,—the crinoid and the starfish.