INDEX 
De Vries, mutation theory of, 402; 
portrait, 4o 3; Summary, 406 
Dufour, Léon, on insect anatomy, 
100 
Dujardin, 250, 262; discovers sar- 
code, 250, 266; portrait, 265; 
writings, 264 
E 
Edwards, H. Milne-, 157; portrait, 
157 
Ehrenberg, 106, 107; portrait, 108 
Embryological record, interpretation 
of, 229 
Embryology, Von Baer and the rise 
of, 194-236; experimental, 232; 
gill-clefts and other rudimentary 
organs in embryos, 361; theoret- 
ical, 235 
Epochs in biological history, 20 
Evolution, doctrine of, generalities 
regarding, 345; controversies re- 
garding the factors, 346, 369; fac- 
tors of, 368; effect on embryology, 
2253; on paleontology, 332; na- 
ture of the question regarding, 
348; a historical question, 348; 
the historical method in, 348; 
sweep of, 366; one of the greatest 
acquisitions of human knowledge, 
366; predictions verified, 367; 
theories of, 369; Lamarck, 369; 
Darwin, 386; Weismann, 392; 
De Vries, 402; summary of evo- 
lution theories, 404; vagueness 
regarding, 346 
Evolutionary series, 351; shells, 351; 
horses, 354 
Evolutionary thought, rise of, 4o7- 
433; views of certain fathers of the 
church, 408 
Experimental observation, intro- 
duced by Harvey, 39-53 
Experimental work in biology, 439 
F 
Fabrica, of Vesalius, 30 
Fabricius, Harvey’s teacher, 41; 
portrait, 43 
Factors of evolution, 369 
Fallopius, 36; portrait, 37 
Flood, fossils ascribed to, 323 
Fossil life, the science of, 320-341; 
bones, 322, 325; horses in Amer- 
ica, 355; collections in New 
465 
Haven, 355; in New York, 355; 
man, 340, 364; Neanderthal skull, 
365; ape-like man, 364 
Fossil remains an index to past his- 
tory, 329 
Fossils, arrangement in strata, 328; 
ascribed to the flood, 323; their 
comparison with living animals, 
324; from the Faydm district, 341; 
method of collecting, 340; nature 
of, 322; determination of, by 
Cuvier, 325; Da Vinci, 322; 
Steno, 322; strange views regard- 
ing, 320 
G 
Galen, 23, 180; portrait, 25 
Galton, law of ancestral inheritance, 
318; portrait, 317 
Geer, De, on insects, 95 
Gegenbaur, 163; portrait, 164 
Generation, Wolff’s theory of, 210 
Germ-cells, organization of, 210 
Germ-layers, 218 
Germ-plasm, continuity of, 393; 
complexity of, 395; the hereditary 
substance, 311; union of germ- 
plasms the source of variations, 
396 
Germ-theory of disease, 293 
Germinal continuity, 224, 308; doc- 
trine of, 224, 311, 393 
Germinal elements, 305 
Germinal selection, 397 
Germinal substance, 310 
Gesner, 112; personality, 113; por- 
trait, 114; natural history of, 113 
Gill-clefts in embryos, 361 
Goodsir, 174 
Grew, work of, 56 
H 
Haeckel, 431; portrait, 432 
Haller, fiber-theory, 242; opposition 
to Wolff, 211; in physiology, 181; 
portrait, 182 
Harvey, and experimental observa- 
tion, 39-53; his argument for the 
circulation, 51; discovery of the 
circulation, 47; his great classic, 
46; education, 40; in embryology, 
198; embryological treatise, 199, 
200; frontispiece from his genera- 
tion of animals (1651), 201; in- 
fluence of, 52; introduces exper- 
