598 
Germinal membrane, 737, 756. 
spot, 732. 
— vesicle, 732. 
Gizzard, of Birds, 200, 201; of Insects, 
202; of Bryozoa, 202; of Rotifera, 292. 
Glands, secreting, structure of, 355—358. 
— mesenteric, 218; lymphatic, 219. 
Glaucus, 316. 
Globules of Blood (see Blood). 
Globulin, 232. 
Glosso-pharyngeal nerve, 459, 470. 
Glottis, 193, 681. 
Glow-worms, 398—401, 
Gluten of bread, composition of, 153. 
Glycine, 364. 
Glycocholic acid, 364. 
Gnat, larva of, 321. 
Goat-moth, larva of, 141. 
Goldfinch, nest of, 704. 
Gout, nature and cure of, 348, 349. 
Granulation, repair of wounds by, 392. 
Gravel, 348, 367. 
Gregory, Dr., case of, 349. 
Grey substance of nerves, 430, 431. 
Guiding Sensations, importance of, 478. 
Gymnotus, electricity of, 419—424. 
H. 
Habitual actions, 479. 
Hematin, 232. 
Hairs, structure of, 38. 
Hall, Dr. Marshall, his treatment of 
asphyxia, 339. 
Hamster, instinct of, 699. 
Hands, use of, in prehension, 172, 173; in 
locomotion, 674; structure of, 641— 
644. 
Hare, leaps of the, 661. 
Hartz forest, devastated by Insects, 147. 
Haversian canals of bone, 49, 50; forma- 
tion of, 52. 
Head, definition of, 111; bones of, 617— 
623; muscles of, 624, 
Healing of wounds, 391, 392. 
Hearing, sense of, 510—524; improved 
by cultivation, 525. . 
Heart, 245; structure of, in Man, &c., 
256, 257; respiratory and systemic, 
281; action of, 269, 270, 581, 583; 
valves of, 272, 273; number of pulsa- 
tions of, 271; development of, 758, 
762, 
—— structure of, in Reptiles, 284; in 
Fishes, 286; in Mollusca, 290; in 
Cephalopoda, 291; in Crustacea, 292; 
in Insects, 293. 
Heat, sustainabl 
372, 373. 
—— generated by Animals, 403—415; 
of Invertebrata, 404; of Fishes, 405; 
of Reptiles, 406; of Birds, 407; of 
Mammabs, 407; of Man, 407; of young 
animals, 408, 409; of Insects, 410, 
411. : 
by Animals, Jnirod., 
INDEX. 
Heat, animal, dependent on combustion 
of carbon and hydrogen, 412, 413; on 
supply of oxygen, 413; maintained 
respiration, 414; influence of nervous 
system on, 415. 
Hemispheres of Brain, 449. 
Herbivorous animals, 144—147; nutri- 
tion of, 162; teeth of, 179, 182. 
Hiccup, 341, 
Hinge-joint, 603. 
Hippuric acid, 367. 
Holothuria, 118, 119; reparative power 
of, 389; development of, 741. 
Horse, foot of, 652; intelligence of, 695. 
Howling Monkeys, 684. 
Humble-bee, heat produced by, 410, 
Hunger, sense of, 140, 205. 
Hyalea, 112. 
Hybernation, 309. 
Hydatina, multiplication of, 750. 
. Hydra, 121; referred to, 131, 296, 577; 
propagation of, by buds, 122, 726; by 
artificial division, 122; by eggs, 123, 
734 ; development of ovum of, 738. 
Hydrogen, combustion of, inanimal body, 
343. 
Hydropathic system, 374. 
Hydrophobia, 474. 
Hydrozoa, 124, 125; development of, 
726, 738. 
Hyoid bone, 625, 680. 
Hysteric disorder, 474, 
I. 
Iliac bones, 645, 
Images, formation of, by lenses, 531; on 
retina, 543, 544. 
Imago or perfect insect, 745. 
a vagnics of the soul of man, 721, 
22. 
Impressions on nervous system, 432, 486. 
Incisor teeth, 181, 183. 
Infants, necessity of warmth to, 408, 409, 
Infusoria, 133—135;. multiplication of, 
725 
Ink, of cuttle-fish, 359. 
Insalivation, 179, 190, 191. 
Insects, general characters of, 97; diges- 
tive apparatus of, 202; circulation in, 
293; respiration in, 308, 321, 322; repa- 
rative powers of, 389; secreting appa- 
ratus in, 358; luminousness of, 397— 
401; heat of, 410, 411; nervous system 
of, 440—446 ; instincts of, 483, 484, 667 
—716; antenne of, 498, 499; eyes of, 
573—575; muscular power of, 594, 662; 
wings of, 670 ; production of sounds by, 
676, 679; reproduction of, 745, 746. 
Instinctive actions, 692; predominance 
of, in Articulata, 96; characters of, 
694; examples of, 696—716; corre- 
spondence of, with ganglia of special 
sense, 475—479; irrationality of, 709, 
