Granivorous

(Lat. granum, a grain or seed; voro, I devour). Living upon grains or other seeds.

Graptolitidae

(Gr. grapho, I write; lithos, stone). An extinct sub-class of the Hydrozoa.

Gregarinida

(Lat. gregarius, occurring in numbers together). A class of the Protozoa.

Guard

The cylindrical fibrous sheath with which the internal chambered shell (phragmacone) of a Belemnite is protected.

Gymnoblastic

(Gr. gumnos, naked; and blastos, a bud). Applied by Prof.

Allman to those Hydrozoa in which the nutritive and reproductive buds are not protected by horny receptacles.

Gymnolamata

(Gr. gumnos, naked; laimos, the throat). An order of the Polyzoa in which the mouth is devoid of the valvular structure known as the "epistome." Gymnophiona (Gr. gumnos, naked; ophis, a snake). The order of the Amphibia comprising the snake-like Caecilioe.

Gymnophthalmata

(Gr. gumnos; and ophthalmos, the eye). Applied by Edward Forbes to those Medusas in which the eye-specks at the margin of the disc are unprotected. The division is now abandoned.

Gymnosomata

(Gr. gumnos; and soma, the body). The order of Pteropoda in which the body is not protected by a shell.

Gynophores

(Gr. gune, woman; phero, I carry). The generative buds, or gonophores, of Hydrozoa, which contain ova alone, and differ in form from those which contain spermatozoa.

Gyrencephala

(Gr. guroo, I wind about; egkephalos, brain). Applied by Owen to a section of the Mammalia in which the cerebral hemispheres are abundantly convoluted.

HAEMAL

(Gr. haima, blood). Connected with the blood-vessels, or with the circulatory system.

HAEMATOCRYA

(Gr. haima, blood; cruos, cold). Applied by Owen to the "cold-blooded." Vertebrates - viz., the Fishes, Amphibia, and Reptiles.

Haematotherma

(Gr. haima, blood; thermos, warm). Applied by Owen to the "warm-blooded" Vertebrates - viz., Birds and Mammals.

Hallux

(Lat. allex, the thumb or great toe). The innermost of the five digits which normally compose the hind foot of a Vertebrate animal. In man, the great toe.

Halteres

(Gr. halteres, weights used by athletes to steady themselves in leaping). The rudimentary filaments or "balancers" which represent the posterior pair of wings in the Diptera, an order of Insects.

Haustellate

(Lat. haurio, I drink). Adapted for sucking or pumping up fluids; applied to the mouth of certain Crustacea and Insecta.

Hectocotylus

(Gr. hekaton, a hundred; kotulos, a cup). The metamorphosed reproductive arm of certain of the male Cuttle-fishes. In the Argonaut the arm becomes detached, and was originally described as a parasitic worm.

Heliozoa

(Gr. helios, sun; zoon, animal). An order of Protozoa, with radiating pseudopodia.

Helminthoid

(Gr. helmins, an intestinal worm). Worm-shaped, vermiform.