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re. -- Geographical mile. See under Mile. -- Geographical variation, any variation of a species which is dependent on climate or other geographical conditions.

Any species of geometrid moth; a geometrid.

One of numerous genera and species of moths, of the family Geometridæ; -- so called because their larvæ (called loopers, measuring worms, spanworms, and inchworms) creep in a looping manner, as if measuring. Many of the species are injurious to agriculture, as the cankerworms.

apsules are arranged, and membranous projections, or stipules, at the joints. Most of the species have showy flowers and a pungent odor. Called sometimes crane's-bill.

One of several species of small, jumping, murine rodents, of the genus Gerbillus. In their leaping powers they resemble the jerboa. They inhabit Africa, India, and Southern Europe.

largest of living Amphibia, becoming a yard long. -- Giant squid (Zoöl.), one of several species of very large squids, belonging to Architeuthis and allied genera. Some are over forty feet long.

Any arboreal ape of the genus Hylobates, of which many species and varieties inhabit the East Indies and Southern Asia. They are tailless and without cheek pouches, and have very long arms, adapted for climbing.

A marine fish. The name is applied to two species:

A plant of the genus Zingiber, of the East and West Indies. The species most known is Z. officinale.

A genus of plants having bulbous roots and gladiate leaves, and including many species, some of which are cultivated and valued for the beauty of their flowers; the corn flag; the sword lily.

o small pieces. It grows to the length of three feet. The name is applied also to similar species found in the Old World.

A species of blindness in horses in which the eye is bright and the pupil dilated; a sort of amaurosis. Youatt.

istlelike plant with the flowers in large globular heads (Cynara Scolymus); also, certain species of the related genus Echinops. -- Globe valve. (a) A ball valve. (b) A valve inclosed in a globular chamber. Knight.

us insect of the genus Lampyris; esp., the wingless females and larvæ of the two European species (L. noctiluca, and L. splendidula), which emit light from some of the abdominal segments. Like a glowworm in the night, The which hath fire in darkness, none in light. Shak.

A genus of papilionaceous herbaceous plants, one species of which (G. glabra), is the licorice plant, the roots of which have a bittersweet mucilaginous taste.

ontidæ) of extinct South American edentates, of which Glyptodon is the type. About twenty species are known.

and allies, as the buffalo gnat, the black fly, etc. Gnat catcher (Zoöl.), one of several species of small American singing birds, of the genus Polioptila, allied to the kinglets. -- Gnat flower, the bee flower. -- Gnat hawk (Zoöl.), the European goatsucker; -- called also gnat owl. -- Gnat snapper (Zoöl.), a bird t…

One of two species of large South African antelopes of the genus Catoblephas, having a mane and bushy tail, and curved horns in both sexes. [Written also gnoo.]

A species of antelope (Procapra picticauda), inhabiting Thibet.

A hollow-horned ruminant of the genus Capra, of several species and varieties, esp. the domestic goat (C. hircus), which is raised for its milk, flesh, and skin.