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.
HEMIPTERA.--An order or sub-order of insects, characterised by the
possession of a jointed beak or rostrum, and by having the fore-wings horny
in the basal portion and membranous at the extremity, where they cross each
other. This group includes the various species of bugs.
HERMAPHRODITE.--Possessing the organs of both sexes.
HOMOLOGY.--That relation between parts which results from their development
from corresponding embryonic parts, either in different animals, as in the
case of the arm of man, the fore-leg of a quadruped, and the wing of a
bird; or in the same individual, as in the case of the fore and hind legs
in quadrupeds, and the segments or rings and their appendages of which the
body of a worm, a centipede, etc., is composed. The latter is called
serial homology. The parts which stand in such a relation to each other
are said to be homologous, and one such part or organ is called the
homologue of the other.
Pages:
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796