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taining to, a tail; having a tail-like appendage. The male widow-bird, remarkable for his caudal plumes. Darwin. Caudal fin (Zoöl.), the terminal fin (or "tail") of a fish.

Having, or terminating in, two tails.

Situated under, or on the ventral side of, the tail; as, the subcaudal, or chevron, bones.

Two-tailed; bicaudal.

n architecture. Chevron bones (Anat.), The V-shaped subvertebral arches which inclose the caudal blood vessels in some animals.

lida. Those near the head of annelids are Tentacular cirri; those of the last segment are caudal cirri.

The caudal spring used by Podura and related insects for leaping. See Collembola.

e and hind legs of the higher animals. -- Unpaired, or Median, fins (Zoöl.), the dorsal, caudal, and anal fins.

The caudal forceps-shaped appendage of earwigs and some other insects. See Earwig. Dressing forceps. See under Dressing.

One of the small, spiniform scales found on the front edge of the dorsal and caudal fins of many ganoid fishes.

ge, hairless caterpillars ornamented with green and other bright colors, and often with a caudal spine. See Sphinx, also Tobacco worm, and Tomato worm. Tobacco Hawk Moth (Macrosila Carolina), and its Larva, the Tobacco Worm.

Under the tail; -- applied to the bones which support the caudal fin rays in most fishes.

Situated behind any transverse axis in the body of an animal; caudal; posterior; especially, behind, or on the caudal or posterior (that is, ulnar or fibular) side of, the axis of a vertebrate limb.

At or toward the caudal extremity; caudal; -- in human anatomy often used for dorsal.

yræa, having a cylindrical body with a terminal anal opening, and usually with one or two caudal gills.

Having a caudal fin extending around the end of the vertebral column, like that which is first formed in the embryo of fishes; diphycercal.

oidea having the palpi terminated by large claws, as in the scorpions, but destitute of a caudal sting; the false scorpions. Called also Pseudoscorpii, and Pseudoscorpionina. See Illust. of Book scorpion, under Book.

and allied genera, esp. Harpyia vinuli, of Europe. The larvæ are humpbacked, and have two caudal appendages.

The caudal plate of trilobites, crustacean, and certain insects. See Illust. of Limulus and Trilobite.

t birds; the plowshare bone; the vomer. It is formed by the union of a number of the last caudal vertebræ, and supports the uropigium.