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A linnæan genus which included the moths in general.

Any moth of the family Phalænidæ, of which the cankerworms are examples; a geometrid.

Same as Acraspeda.

A brown coloring matter found in certain algæ.

An order of fresh-water Bryozoa in which the tentacles are arranged on a horseshoe-shaped lophophore, and the mouth is covered by an epistome. Called also Lophopoda, and hippocrepians.

Of or pertaining to the Phylactolæma.

An order of Siphonophora which includes Physalia.

An order of Siphonophora, furnished with an air sac, or float, and a series of nectocalyces. See Illust. under Nectocalyx.

An extensive division of birds which includes the woodpeckers, toucans, trogons, hornbills, kingfishers, motmots, rollers, and goatsuckers. By some writers it is made to include also the cuckoos, swifts, and humming birds.

One of the two principal groups of Chætopoda. It includes those that have prominent parapodia and fascicles of setæ. See Illust. under Parapodia.

Same as Oscines.

Same as Hydrozoa.

The fresh-water sponges. See Spongilla.

A prefix. See Pre-.

The superior vena cava. -- Præ"ca`val, a. B. G. Wilder.

A writ commanding something to be done, or requiring a reason for neglecting it.

A division of birds including those whose young are able to run about when first hatched.

Of or pertaining to the Præcoces.

This previously known, or which should be known in order to understand something else.

A transverse commissure in the anterior part of the third ventricle of the brain; the anterior cerebral commissure.