., 199 f.n., 230

Geometry of the Organism, 33
K. G. Carus, 98-100, 249
Bronn, 201, 249
Haeckel, J. Mueller, Burmeister, G. Jaeger, 249

Germinal Vesicle (Egg-nucleus), 175-7, 188, 291 f.n.

Germ-Layer Theory--
Von Baer, 115-6, 118-9, 208-9, 296
Pander, 119-20, 209
C. F. Wolff, 119-20
Rathke, 136, 208
Lereboullet, Bischoff, 208
Huxley, 208, 289
Remak, 209-12, 296

Germ-Layers and Gastraea Theory--
Haeckel, 289-95
Lankester, Balfour, 295

Germ-Layer Theory, Influence of Causal Morphology on, 347

Gesner, 18

Giard, A.--
On Ascidian Theory, 271-3
Adaptive Homology, 273
Poecilogeny, 347-8

Glisson, F., 19

Gluge, 173

Goebel, K., 356 f.n.

Goethe, 45-51, 65, 89, 250
Unity of Plan, 45-7, 51
Homology, 47
Principle of Connections, 47
Formal and Functional Attitudes, 48-50
Teleology, 48
Metamorphosis of Plants, 48
Repetition of parts, 48-9
Vertebral Theory of Skull, 49, 96, 97
Law of Compensation, 49
Embryological Criterion, 49
Organisms as Nature's Works of Art, 50

Goette, 259

Graaf, von, 175

Grew, N., 169

Gruber, 330

HAECKEL, Ernst, 247-60, 271, 314, 342, 353, 357
His sources, 248-50
Materialism, 248, 250
On Teleology, Heredity and Adaptation, 248, 263
Correlation, Disregard for, 248, 264
Geometry of the Organism (Promorphology), 249
Repetition of Parts (Tectology), 249-50
Classification as Genealogical, 250-1, 254
Archetype as ancestral, 251
Homology and Analogy, 251
Biogenetic Law, 251, 253-9, 291-4
Three-fold parallelism, 254-5
Scale of Beings, 255, 256-7
Organism as an Historical Being, 257
Prussianism, 257
Palingenesis, 258
Cenogenesis, 258-9
Heterotopy, Heterochrony, 259
Gastraea Theory, 269, 288-95
Phylogenetic Classification, 289-94
Criticism of Theory of Types, Monophyletism, 289, 291
Gastraea Theory and Biogenetic Law, 291-4
Primary stages of Ontogeny and Phylogeny, 291-3
Coelom, 291, 295, 296
Experimental Embryology, 317

Haller, 113

Harting, 284 f.n.

Hartmann, E. von--
On Darwin's conception of correlation, 240-1
Evolution, 244, 356

Hartog, M., 344

Harvey, 18, 113

Hatschek, 270 f.n., 299

Helmholtz, H. von, 195

Henle, 172

Hensen, V., 209 f.n.

Herbst, C., 333

Herder, 46

Heredity and Memory, 336-44

Hering, E., 341-2

"Heritage" Characters, 309, 322

Herlitzka, 332

Herophilus, 17

Hertwig, O., 163, 330, 331, 346
O