INDEX 



251 



Epithelio-muscle cells of Hydra, 84 



Equation division, 211 



Erxleben, cause of fermentation, 38 



Euglena, 54 



Euplectella with commensal crus- 

 tacea, 193, 194 



Euplotes patella in division, 13 



Evolution, 205 



Excretion and respiration in Hydra, 

 92 



Excretory system of the earthworm, 

 146; of the lobster, 177 



Exopodites of lobster appendages, 

 1 68 



Experimental biology, 206 



External apertures of the earth- 

 worm, 135 



Eyes, of the lobster, 181 



Facultative parasites, 193 



False indusium of the fern, 124 



Farre, 179 



Fate of absorbed food in earthworm, 

 144 



Ferments, definition, 39; in diges- 

 tion, 40 



Fermentation, alcoholic, 37 



Fern, chromosome reduction, 215; 

 structures and functions, 110-129 



Fibrillar theory of protoplasmic 

 structure, 17 



Flagella, definition, 23 



Flagellated protozoa, 53-59 



Flemming, mitosis, 209 



Food of animals, 103 



Form as a manifestation of vitality, 



17 



Formative cells of Hydra, ectoder- 

 mal, 89; endodermal, 90 



Galton, germ plasm, 208 

 Gametophyte, 124 

 Ganglia in metazoa, 93 

 Gastric mill, 172 

 Gastric vacuoles of Amoeba, 47 

 Gastrula, stage in development, 79 

 Gastrulation in metazoa, 79 

 General biology, subject matter, 4 

 Generalized organisms, 28 

 Gemmation, method of reproduction, 



13 



Genetics, 207; subject matter, 3 

 Germ cells after maturation, 215; 



in maturation, 213 

 Germination of fern spores, 124 

 Gerstaecker, 177, 178, 179 

 Gills of the lobster. 174 

 Gizzard of the earthworm, 138 



Gonium pectorale, a i6-cell colony, 



59; in reproduction, 78 

 Gregaloid colonies of protozoa, 76 

 Growth, a property of protoplasm, 



12 



Guard cells of the fern, 117 



H 



Habits of earthworms, 132; of the 

 lobster, 166 



Haematochrome, 109 



Haemocoel of the lobster, 174 



Haploid number of chromosomes, 

 214 



Harrington, calciferous glands, 140 



Harvey, omne vivum ex vivo, 68 



Hazen, 108 



Hedge, 141, 143 



Hensen, worm castings, 144 



Hepato-pancreas, 172 



Heredity, and Mendelism, 219; of 

 one pair of characters, 219; of 

 sex, 225; of two pairs of charac- 

 ters, 224 



Herrick, 183, 185 



Hertwig, R., 188, 192 



Heterozygous germ cells, 222 



Hipparion, fossil horse, 234 



Histology, of Hydra, 83; of Pteris, 

 112; subject matter, 3 



Hofer, experiments with amoeba, 49 



Hofmeister, 127 



Holoblastic cleavage, 79 



Holophytic nutrition, 55 



Holozoic nutrition, 55 



Homology and classification, 162; in 

 insects, 188 



Homozygous germ cells, 222 



Howes, 48 



Homarus Americanus, the lobster, 

 166 



Homaxonic forms, 18 



Hooke, cells, 26 



Hoppe-Seyler, chemical composi- 

 tion of protoplasm, 7 



Hormones, 41 



Huxley, protoplasm, 6; spontaneous 

 generation, 67 



Hydra, budding, 13 



Hydra fusca, 14; and Hydra viridis, 

 82; structures and functions, 82- 

 96 



Hydroids, 98 



Hypnotoxin, in the nettle cells of 

 hydra, 90 



Immortality in protozoa, 70 

 Immunity, 197 

 Indusium, 124 



