product from the blood or sap of animals or plants.

GLOTTIS. — The opening of the windpipe into the oesophagus or gullet.

GNEISS. — A rock approaching granite in composition, but more or less laminated, and really produced by the alteration of a sedimentary deposit after its consolidation.

GRALLATORES. — The so-called wading-birds (storks, cranes, snipes, etc.), which are generally furnished with long legs, bare of feathers above the heel, and have no membranes between the toes.

GRANITE. — A rock consisting essentially of crystals of felspar and mica in a mass of quartz.

HABITAT. — The locality in which a plant or animal naturally lives.